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Question 1
Correct
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A 12-year-old girl comes to the paediatric outpatient departments with a height of 142 cm, which is below the 0.4th centile. Upon examination, she has an immature-appearing face and a significantly delayed bone age on wrist x-ray. Her TSH levels are normal, and she is at an appropriate Tanner stage. It is noted that her mother had her menarche at the age of 11 years. What is the probable diagnosis for this patient?
Your Answer: Growth hormone deficiency
Explanation:Growth Hormone Deficiency as a Cause of Short Stature in Pubescent Girls
A girl who has gone through puberty but has not gained height may have growth hormone deficiency. This condition is characterized by a discrepancy between the girl’s bone age and chronological age, as well as a doll-like face that gives her an immature appearance. Growth hormone deficiency is a rare but significant cause of short stature, as it can be a symptom of an underlying disease and can be treated with replacement injections.
In some cases, GH deficiency may be caused by intracerebral masses, particularly craniopharyngiomas in 7- to 10-year-olds. However, if a chronic illness were the cause, such as coeliac disease or Cushing syndrome, it would likely delay puberty and result in an inappropriately young Tanner stage. The girl would also be expected to exhibit features of the chronic condition.
It is important to note that this girl is not suffering from constitutional delay, as she has already entered puberty and has appropriate Tanner staging. Constitutional delay is typically characterized by a family history and delayed menarche in the affected individual. Therefore, growth hormone deficiency should be considered as a potential cause of short stature in pubescent girls who have not gained height despite going through puberty.
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This question is part of the following fields:
- Paediatrics
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Question 2
Correct
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Which structure, containing both white and red pulp, is responsible for trapping foreign substances present in the blood?
Your Answer: Spleen
Explanation:Comparison of Lymphoid Organs and Non-Lymphoid Organs
The human body contains various organs that serve different functions. Among these are the lymphoid organs, which play a crucial role in the immune system. In this article, we will compare the characteristics of three lymphoid organs (spleen, lymph node, and thymus) with two non-lymphoid organs (heart and thyroid gland).
Spleen
The spleen is the largest secondary lymphoid organ. It is located in the left upper quadrant of the abdomen and contains both white pulp (lymphatic tissue and macrophages) and red pulp (sinusoids and red blood cells). One of its functions is to filter foreign substances from the blood.Lymph Node
Lymph nodes are secondary lymphoid organs that contain structures where mature lymphocytes are stimulated by antigens to undergo further division and differentiation. They do not contain white and red pulp.Thymus
The thymus is a primary lymphoid organ where T lymphocytes mature, differentiate, and proliferate. It does not contain white and red pulp.Heart
The heart is the main organ of the circulatory system and does not contain white and red pulp.Thyroid Gland
The thyroid gland is located in the anterior neck and is part of the endocrine system. It does not contain white and red pulp.In summary, lymphoid organs play a crucial role in the immune system, while non-lymphoid organs serve other functions. Understanding the characteristics of these organs can help us appreciate the complexity and diversity of the human body.
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This question is part of the following fields:
- Haematology
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Question 3
Incorrect
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A 10-year-old girl tripped while playing outside. She outstretched her arms to brace herself against the ground and immediately grabbed her right elbow in pain. She was taken to the Emergency Department and an X-ray revealed a right humeral supracondylar fracture.
Which of the following deficits is this child most likely to suffer?Your Answer: Loss of sensation to the fourth and fifth fingers of the right hand
Correct Answer: Weakness to the right index finger
Explanation:Common Nerve Injuries and their Effects on Hand Function
Weakness to the right index finger may indicate an anterior interosseous nerve injury, commonly seen in supracondylar fractures. Loss of sensation to the fourth and fifth fingers of the right hand may result from an ulnar nerve injury, often associated with supracondylar humeral fractures. Atrophy of the biceps brachii muscle may occur with damage to the musculocutaneous nerve, which can be compressed between the biceps and brachialis fascia or injured in upper brachial plexus injuries. Weakness of wrist flexion may result from median nerve injury, which can also cause sensory loss and motor deficits in the forearm and thumb. Loss of sensation to the dorsum of the hand is likely due to radial nerve damage, often seen in mid-humeral shaft fractures. Understanding these common nerve injuries and their effects on hand function can aid in diagnosis and treatment.
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This question is part of the following fields:
- Orthopaedics
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Question 4
Incorrect
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What is the most common characteristic of a patient with a deficiency in vitamin C?
Your Answer: Cheilosis and beefy red tongue
Correct Answer: Perifollicular haemorrhages and hyperkeratosis
Explanation:Vitamin C Deficiency and its Symptoms
Vitamin C is primarily found in fruits and vegetables. When there is a deficiency of ascorbic acid, it can lead to a condition called scurvy. The symptoms of scurvy include inflamed and bleeding gums, impaired wound healing, and petechiae. Cutaneous findings such as follicular hyperkeratosis, perifollicular haemorrhages, ecchymoses, xerosis, leg oedema, poor wound healing, and bent or coiled body hairs are also common.
It is important to note that cheilosis and red tongue are more indicative of vitamin B12 or iron deficiency, while diarrhoea and delusions suggest vitamin B deficiency (pellagra). Ocular muscle palsy and dementia are more likely to be caused by thiamine deficiency or Wernicke’s encephalopathy.
Vitamin C deficiency is not uncommon among the elderly population, and it is crucial to be aware of the signs and symptoms to make a proper diagnosis. The diagnosis can be confirmed by measuring vitamin C concentrations in the white cell. By the symptoms and causes of vitamin C deficiency, individuals can take steps to prevent and treat this condition.
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This question is part of the following fields:
- Clinical Sciences
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Question 5
Incorrect
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A 30-year-old female patient complains of anxiety and weight loss. During the examination, a fine tremor of the outstretched hands, lid lag, and a moderate goitre with a bruit are observed. What is the probable diagnosis?
Your Answer: Hashimoto's thyroiditis
Correct Answer: Graves' disease
Explanation:Thyroid Disorders and their Differentiation
Thyroid disorders are a common occurrence, and their diagnosis is crucial for effective treatment. One such disorder is Graves’ disease, which is characterized by a goitre with a bruit. Unlike MNG, Graves’ disease is associated with angiogenesis and thyroid follicular hypertrophy. Other signs of Graves’ disease include eye signs such as conjunctival oedema, exophthalmos, and proptosis. Additionally, pretibial myxoedema is a dermatological manifestation of this disease.
De Quervain’s thyroiditis is another thyroid disorder that follows a viral infection and is characterized by painful thyroiditis. Hashimoto’s thyroiditis, on the other hand, is a chronic autoimmune degradation of the thyroid. Multinodular goitre (MNG) is the most common form of thyroid disorder, leading to the formation of multiple nodules over the gland. Lastly, a toxic thyroid nodule is a solitary lesion on the thyroid that produces excess thyroxine.
In conclusion, the different types of thyroid disorders and their symptoms is crucial for accurate diagnosis and effective treatment.
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This question is part of the following fields:
- Endocrinology
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Question 6
Correct
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A 12-year-old girl comes to the emergency department with a headache. During the examination, she mentions that the lights are bothering her eyes and the doctor observes a purpuric rash on her chest. Her respiratory rate is 22/min, heart rate is 140/min, and blood pressure is 80/60 mmHg. Which of the following tests should be avoided in this patient?
Your Answer: Lumbar puncture
Explanation:Performing a lumbar puncture is not recommended for patients with meningococcal septicaemia, which is a contraindication. In cases of suspected meningitis and sepsis, a coagulation screen and blood glucose may be ordered in secondary care, while blood cultures and serum lactate are typically included in the sepsis 6 protocol.
Investigation and Management of Meningitis in Children
Meningitis is a serious condition that can affect children. When investigating meningitis, it is important to note any contraindications to lumbar puncture, such as signs of raised intracranial pressure, focal neurological signs, papilloedema, significant bulging of the fontanelle, disseminated intravascular coagulation, or signs of cerebral herniation. For patients with meningococcal septicaemia, a lumbar puncture is contraindicated, and blood cultures and PCR for meningococcal should be obtained instead.
The management of meningitis in children involves administering antibiotics, such as IV amoxicillin (or ampicillin) and IV cefotaxime for children under three months, and IV cefotaxime (or ceftriaxone) for children over three months. Steroids should be considered if the lumbar puncture reveals certain findings, such as purulent cerebrospinal fluid, a high white blood cell count, or bacteria on Gram stain. Fluids should be administered to treat shock, and cerebral monitoring should be conducted, including mechanical ventilation if necessary.
It is also important to notify public health authorities and administer antibiotic prophylaxis to contacts. Ciprofloxacin is now preferred over rifampicin for this purpose. Overall, prompt and appropriate management of meningitis in children is crucial for ensuring the best possible outcomes.
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This question is part of the following fields:
- Paediatrics
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Question 7
Correct
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A 26-year-old female arrives at the emergency department complaining of sporadic abdominal pain and vaginal bleeding. She believes her last menstrual cycle was 8 weeks ago but is uncertain. She has no prior gynecological history and has never been pregnant before. Her vital signs are stable, with a blood pressure of 130/85 mmHg and a pulse rate of 79 bpm. A pregnancy test conducted in the department is positive, and a transvaginal ultrasound confirms a pregnancy in the adnexa with a fetal heartbeat present. What is the most appropriate course of action in this scenario?
Your Answer: Surgical management - salpingectomy or salpingostomy
Explanation:The patient has a confirmed ectopic pregnancy, which requires definitive treatment even though there is no evidence of rupture. While expectant management may be an option for those without acute symptoms and decreasing beta-HCG levels, close monitoring is necessary and intervention is recommended if symptoms arise or beta-HCG levels increase. If a fetal heartbeat is present, conservative and medical management are unlikely to be successful and may increase the risk of rupture, which is a medical emergency. Therefore, surgical removal of the ectopic is the most appropriate option. If the opposite tube is healthy, salpingectomy may be the preferred choice. However, if the opposite tube is damaged, salpingostomy may be considered to preserve the functional tube and reduce the risk of future infertility.
Understanding Ectopic Pregnancy
Ectopic pregnancy occurs when a fertilized egg implants outside the uterus. This condition is characterized by lower abdominal pain and vaginal bleeding, typically occurring 6-8 weeks after the start of the last period. The pain is usually constant and may be felt on one side of the abdomen due to tubal spasm. Vaginal bleeding is usually less than a normal period and may be dark brown in color. Other symptoms may include shoulder tip pain, pain on defecation/urination, dizziness, fainting, or syncope. Breast tenderness may also be reported.
During examination, abdominal tenderness and cervical excitation may be observed. However, it is not recommended to examine for an adnexal mass due to the risk of rupturing the pregnancy. Instead, a pelvic examination to check for cervical excitation is recommended. In cases of pregnancy of unknown location, serum bHCG levels >1,500 may indicate an ectopic pregnancy. It is important to seek medical attention immediately if ectopic pregnancy is suspected as it can be life-threatening.
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This question is part of the following fields:
- Obstetrics
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Question 8
Incorrect
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A 93-year-old man is brought into the emergency department after a car accident. He was in the passenger seat and wearing a seatbelt at the time.
His son, who was also in the car, reports hearing a loud 'thud' when his father's knees hit the dashboard. He had a right total hip replacement 12 years ago.
A primary survey shows right-sided dislocation of the hip.
What findings would be anticipated on examination, considering the probable type of dislocation?Your Answer: Hip adduction and external rotation
Correct Answer: Leg shortening and internal rotation
Explanation:A potential complication of total hip replacement is posterior dislocation, which can present with sudden leg shortening, internal rotation, and a clunk sound. This may occur due to direct impact on a flexed hip, such as when sitting in a car. The hip will be adducted, internally rotated, and flexed in a posterior dislocation. Therefore, options suggesting hip abduction, external rotation, or hyperextension are incorrect.
Osteoarthritis (OA) of the hip is a prevalent condition, with the knee being the only joint more commonly affected. It is particularly prevalent in older individuals, and women are twice as likely to develop it. Obesity and developmental dysplasia of the hip are also risk factors. The condition is characterized by chronic groin pain that is exacerbated by exercise and relieved by rest. However, if the pain is present at rest, at night, or in the morning for more than two hours, it may indicate an alternative cause. The Oxford Hip Score is a widely used tool to assess the severity of the condition.
If the symptoms are typical, a clinical diagnosis can be made. Otherwise, plain x-rays are the first-line investigation. Management of OA of the hip includes oral analgesia and intra-articular injections, which provide short-term relief. However, total hip replacement is the definitive treatment.
Total hip replacement is a common operation in the developed world, but it is not without risks. Perioperative complications include venous thromboembolism, intraoperative fracture, nerve injury, surgical site infection, and leg length discrepancy. Postoperatively, posterior dislocation may occur during extremes of hip flexion, presenting with a clunk, pain, and inability to weight bear. Aseptic loosening is the most common reason for revision, and prosthetic joint infection is also a potential complication.
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This question is part of the following fields:
- Musculoskeletal
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Question 9
Incorrect
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A 36-year-old man presents with abnormal liver function tests. He has no history of alcohol consumption and no known risk factors for liver disease. However, his grandfather passed away from liver cancer. Upon investigation, his serum albumin is 38 g/L (37-49), serum total bilirubin is 41 μmol/L (1-22), serum alanine aminotransferase is 105 U/L (5-35), serum alkaline phosphatase is 135 U/L (45-105), serum ferritin is 1360 mcg/L, and serum iron saturation is 84%. A liver biopsy reveals Perls' Prussian blue positive deposits in the liver. What is the most appropriate first-line treatment?
Your Answer: Azathioprine
Correct Answer: Venesection
Explanation:Venesection is the primary treatment for haemochromatosis, with a target serum ferritin of less than 50 mcg/L achieved within three to six months. Azathioprine and prednisolone are not used in treatment, while iron chelators such as desferrioxamine are reserved for certain cases. Ursodeoxycholic acid is used in treating primary biliary cirrhosis.
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This question is part of the following fields:
- Gastroenterology
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Question 10
Correct
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A 23-year-old female presents to the Emergency Department with sudden-onset, right-sided lower abdominal pain over the past few hours. She has associated nausea and vomiting. The pain has now reached the point of being unbearable. She denies any fever, vaginal bleeding, dysuria or altered bowel habits. She has no significant past medical history. She does not take any regular medications.
On examination, she appears to be in significant pain, clutching at her right lower abdomen, which is tender on palpation. Normal bowel sounds are present. There is a palpable adnexal mass on pelvic examination. She is slightly tachycardic. A pregnancy test is negative and urinalysis is normal.
What ultrasound finding would be indicative of the likely diagnosis?Your Answer: Whirlpool sign
Explanation:Ultrasound imaging may reveal a whirlpool sign in cases of ovarian torsion, which is strongly indicated by the patient’s history and examination. The beads-on-a-string sign is typically associated with chronic salpingitis, while hypoechoic masses are often indicative of fibroids. A snow-storm appearance is a characteristic finding in complete hydatidiform mole.
Understanding Ovarian Torsion
Ovarian torsion is a medical condition that occurs when the ovary twists on its supporting ligaments, leading to a compromised blood supply. This condition can be partial or complete and may also affect the fallopian tube, which is then referred to as adnexal torsion. Women who have an ovarian mass, are of reproductive age, pregnant, or have ovarian hyperstimulation syndrome are at a higher risk of developing ovarian torsion.
The most common symptom of ovarian torsion is sudden, severe abdominal pain that is colicky in nature. Patients may also experience vomiting, distress, and in some cases, fever. Upon examination, adnexal tenderness may be detected, and an ultrasound may show free fluid or a whirlpool sign. Laparoscopy is usually both diagnostic and therapeutic for this condition.
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This question is part of the following fields:
- Gynaecology
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Question 11
Incorrect
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A 70-year-old man presents with severe breathlessness which started this morning and has become gradually worse. The patient denies coughing up any phlegm. He has a history of essential hypertension. On examination, the patient has a blood pressure of 114/75 mmHg and a respiratory rate of 30 breaths per minute. His temperature is 37.1°C. His jugular venous pressure (JVP) is 8 cm above the sternal angle. On auscultation there are fine bibasal crackles and a third heart sound is audible. The patient is an ex-smoker and used to smoke 5–10 cigarettes a day for about 10 years.
What is the most likely diagnosis?Your Answer: Pericardial effusion
Correct Answer: Pulmonary oedema
Explanation:Differentiating Pulmonary Oedema from Other Cardiac and Respiratory Conditions
Pulmonary oedema is a condition characterized by the accumulation of fluid in the lungs due to left ventricular failure. It presents with symptoms such as shortness of breath, raised jugular venous pressure, and a third heart sound. Bi-basal crackles are also a hallmark of pulmonary oedema. However, it is important to differentiate pulmonary oedema from other cardiac and respiratory conditions that may present with similar symptoms.
Tricuspid regurgitation is another cardiac condition that may present with a raised JVP and a third heart sound. However, it is characterized by additional symptoms such as ascites, a pulsatile liver, peripheral oedema, and a pansystolic murmur. Pneumonia, on the other hand, is a respiratory infection that presents with a productive cough of yellow or green sputum and shortness of breath. Bronchial breath sounds may also be heard upon auscultation.
Pulmonary embolus is a condition that presents with chest pain, shortness of breath, and signs of an underlying deep vein thrombosis. Pericardial effusion, on the other hand, is characterized by the accumulation of fluid in the pericardial sac surrounding the heart. It may eventually lead to cardiac tamponade, which presents with hypotension, shortness of breath, and distant heart sounds. However, bi-basal crackles are not a feature of pericardial effusion.
In summary, it is important to consider the specific symptoms and characteristics of each condition in order to accurately diagnose and differentiate pulmonary oedema from other cardiac and respiratory conditions.
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This question is part of the following fields:
- Cardiology
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Question 12
Correct
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A 2-month-old baby, born at 38 weeks, is brought in due to increasing fussiness around 30-60 minutes after feeds, frequent regurgitation, 'colic' episodes, and non-bloody diarrhea. The baby has not experienced fever, urticaria, angioedema, or wheezing. The baby is exclusively formula-fed and has mild eczema in the flexural areas. The baby's weight remains stable between the 50-75th centile. What is the most appropriate next step in managing this baby's symptoms?
Your Answer: Extensively hydrolysed formula trial
Explanation:Soya milk is not a suitable alternative as a significant proportion of infants who have an allergy to cow’s milk protein are also unable to tolerate it.
Understanding Cow’s Milk Protein Intolerance/Allergy
Cow’s milk protein intolerance/allergy (CMPI/CMPA) is a condition that affects around 3-6% of children, typically presenting in the first 3 months of life in formula-fed infants. Both immediate and delayed reactions can occur, with CMPA used for immediate reactions and CMPI for mild-moderate delayed reactions. Symptoms include regurgitation, vomiting, diarrhea, urticaria, atopic eczema, colic symptoms, wheeze, chronic cough, and rarely, angioedema and anaphylaxis. Diagnosis is often clinical, with investigations including skin prick/patch testing and total IgE and specific IgE (RAST) for cow’s milk protein.
Management for formula-fed infants includes using extensive hydrolyzed formula (eHF) milk as the first-line replacement formula for mild-moderate symptoms and amino acid-based formula (AAF) for severe CMPA or if no response to eHF. Around 10% of infants are also intolerant to soya milk. For breastfed infants, mothers should eliminate cow’s milk protein from their diet and consider prescribing calcium supplements to prevent deficiency. eHF milk can be used when breastfeeding stops until at least 6 months and up to 12 months of age.
The prognosis for CMPI is usually good, with most children becoming milk tolerant by the age of 3-5 years. However, a challenge is often performed in a hospital setting as anaphylaxis can occur. It is important to refer infants with severe symptoms to a pediatrician for management. Understanding CMPI/CMPA and its management can help parents and healthcare providers provide appropriate care for affected children.
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This question is part of the following fields:
- Paediatrics
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Question 13
Incorrect
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A 55-year-old man is scheduled for colorectal carcinoma resection and has type 2 diabetes. He is currently well-controlled on 5 mg glibenclamide daily. What is the best pre-operative plan for managing his blood sugar levels?
Your Answer: Continue glibenclamide at current dose
Correct Answer: Stop glibenclamide on the morning of surgery and commence insulin by intravenous infusion
Explanation:Management of Glibenclamide in a Patient Undergoing Major Surgery
During major surgery, it is crucial to maintain optimal glycaemic control in patients with diabetes. In the case of a patient taking glibenclamide, the most appropriate course of action is to discontinue the medication on the morning of surgery. Instead, the patient should be started on intravenous (IV) insulin and dextrose with potassium. This approach allows for frequent blood glucose measurements and adjustment of the insulin infusion rate as needed.
By stopping glibenclamide, the risk of hypoglycaemia during surgery is reduced. IV insulin and dextrose with potassium provide a more controlled and predictable method of glycaemic control during the stress of surgery. This approach ensures that the patient’s blood glucose levels remain within a safe range, reducing the risk of complications such as infection, delayed wound healing, and poor surgical outcomes.
In summary, the management of glibenclamide in a patient undergoing major surgery involves discontinuing the medication on the morning of surgery and starting the patient on IV insulin and dextrose with potassium. This approach allows for optimal glycaemic control during the stress of surgery and reduces the risk of complications.
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This question is part of the following fields:
- Endocrinology
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Question 14
Incorrect
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A 55-year-old man with a history of hypertension and type 2 diabetes presents to the Emergency department with complaints of central chest pain that radiates down his left arm. He is currently taking ramipril, metformin, atorvastatin, and gliclazide. On examination, his blood pressure is 129/72 mmHg, and his pulse is 81. Bibasal crackles are heard on auscultation of his chest.
The following investigations were conducted:
- Haemoglobin: 138 g/L (130-180)
- White cell count: 8.9 ×109/L (4-11)
- Platelet: 197 ×109/L (150-400)
- Sodium: 141 mmol/L (135-146)
- Potassium: 4.1 mmol/L (3.5-5)
- Creatinine: 123 µmol/L (79-118)
- Glucose: 12.3 mmol/L (<7.0)
- ECG: Anterolateral ST depression
The patient is given sublingual GTN. What is the next most appropriate therapy?Your Answer: Clopidogrel 300 mg
Correct Answer: Aspirin 300 mg, clopidogrel 300 mg and unfractionated heparin
Explanation:Treatment Plan for High-Risk Patient with Type 2 Diabetes Mellitus
This patient, who has a history of type 2 diabetes mellitus, is considered high risk and requires immediate treatment. The recommended treatment plan includes loading the patient with both aspirin and clopidogrel to reduce the risk of further complications. If the patient experiences further chest pain or if ECG signs do not improve, additional interventions such as angiography may be necessary.
In addition to aspirin and clopidogrel, unfractionated heparin is also recommended as an alternative to fondaparinux for patients who are likely to undergo coronary angiography within 24 hours of admission. If the patient does not progress to angiogram, screening for ischaemia should be considered prior to discharge.
Overall, it is important to closely monitor this high-risk patient and adjust the treatment plan as necessary to ensure the best possible outcome.
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This question is part of the following fields:
- Endocrinology
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Question 15
Correct
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A healthy 28-year-old woman wants to start preparing for an upcoming sports event. She undergoes exercise stress testing.
What is the most probable occurrence in this woman's skeletal muscles during exercise?Your Answer: Increased arteriolar diameter
Explanation:Factors Affecting Blood Flow in Exercising Muscles
During exercise, several factors affect blood flow in the muscles. One of these factors is the diameter of the arterioles, which can increase due to vasodilation of muscle arterioles. Another factor is the concentration of metabolites, such as adenosine, carbon dioxide, and lactic acid, which accumulate in the tissues due to oxygen deficiency and cause vasodilation.
As a result of these factors, blood flow to the muscles can increase up to 20-fold during exercise, which is the greatest increase in any tissue in the body. This increase in blood flow is mainly due to the actions of local vasodilator substances on the muscle arterioles.
However, the increased demand for oxygen during exercise can also lead to a decrease in oxygen concentration in the tissues. This, in turn, can cause an increase in vascular resistance, which can further affect blood flow to the muscles.
Overall, understanding the factors that affect blood flow in exercising muscles is important for optimizing exercise performance and preventing injuries.
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This question is part of the following fields:
- Orthopaedics
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Question 16
Correct
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A 50-year-old man arrived at the Emergency Department with massive haematemesis. An emergency endoscopy revealed a bleeding gastric ulcer located on the lesser curvature of the stomach. Which vessel is most likely affected?
Your Answer: The left gastric artery
Explanation:Arteries that supply the stomach: A brief overview
The stomach is a vital organ that requires a constant supply of blood to function properly. There are several arteries that supply blood to different parts of the stomach. Here is a brief overview of these arteries:
1. Left gastric artery: This artery supplies the lesser curvature of the stomach along with the right gastric artery. Bleeding at the lesser curvature of the stomach is most likely to be caused by these two arteries. The left gastric artery is one of the three branches that arise from the coeliac trunk.
2. Right gastroepiploic artery: This artery, along with the left gastroepiploic artery, supplies the greater curvature of the stomach.
3. Left gastroepiploic artery: This artery, along with the right gastroepiploic artery, supplies the greater curvature of the stomach.
4. Gastroduodenal artery: This artery is a branch off the common hepatic artery that supplies the duodenum, head of the pancreas, and greater curvature of the stomach.
5. Short gastric arteries: These are four or five small arteries from the splenic artery that supply the fundus of the stomach.
Understanding the different arteries that supply the stomach is important for diagnosing and treating various medical conditions related to the stomach.
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This question is part of the following fields:
- Gastroenterology
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Question 17
Correct
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A 49-year-old Asian man undergoes a Mantoux test during his immigration screening upon arrival in the United Kingdom. The test comes back positive, but his chest X-ray appears normal, and he is prescribed isoniazid and pyridoxine (vitamin B6). However, he returns to the hospital four weeks later complaining of fever, abdominal pain, and jaundice. What is the probable cause of his symptoms?
Your Answer: Isoniazid-induced hepatitis
Explanation:Isoniazid Monotherapy for TB Prevention
Isoniazid monotherapy is a treatment used to prevent active tuberculosis in individuals who have been exposed to M. tuberculosis. However, it is important to note that isoniazid-induced hepatitis can occur in approximately 1% of patients, with a higher risk in those over the age of 35. The risk of hepatitis is less than 0.3% in patients under 20 years old, but increases to 2-3% in individuals over 50 years old.
Aside from hepatitis, other side effects of isoniazid therapy include peripheral neuritis, which can be prevented by taking pyridoxine prophylactically. Additionally, a systemic lupus erythematosus (SLE)-like syndrome may also occur. It is important for healthcare providers to monitor patients closely for any adverse reactions while on isoniazid therapy.
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This question is part of the following fields:
- Infectious Diseases
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Question 18
Incorrect
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A 72-year-old hospitalised man with a urinary tract infection and an indwelling bladder catheter (due to a bladder outlet obstruction) has developed episodic fever, chills and a fall in systemic blood pressure since yesterday. The episodes occur irregularly and last almost an hour, during which time he becomes delirious.
Which of the following factors plays a key role in the pathogenesis of this condition?Your Answer: Nitric oxide
Correct Answer: Lipopolysaccharide
Explanation:Understanding the Role of Lipopolysaccharide in Septic Shock
Septic shock is a serious medical condition that can occur as a result of a systemic inflammatory response to an infection. In this state, the body’s immune system is activated, leading to the release of cytokines such as tumour necrosis factor and interleukins. However, the main inciting agent responsible for this activation is Gram-negative bacterial lipopolysaccharide (LPS).
LPS plays a key role in the induction of the monocyte-macrophage system, leading to the release of cytokines and subsequent shock. Nitric oxide, also released by LPS-activated macrophages, contributes to the hypotension associated with sepsis. Additionally, tissue hypoxia can lead to increased production of lactic acid, although lactic acidosis is not the main player in shock.
Understanding the role of LPS in septic shock is crucial for effective treatment and management of this condition. By targeting the underlying cause of the immune system activation, healthcare professionals can work to prevent the development of septic shock and improve patient outcomes.
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This question is part of the following fields:
- Acute Medicine And Intensive Care
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Question 19
Incorrect
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A 26-year-old man has been brought to the Psychiatric Ward by his family members who are concerned about his mental health. They believe he needs to be admitted to the hospital to be formally assessed by Psychiatry. He has been detained under the Mental Health Act (MHA), as he would not agree to be admitted voluntarily. The situation is not an emergency.
What is the appropriate duration for the Section to be valid when admitting this patient under the MHA for assessment?Your Answer: 72 hours
Correct Answer: 28 days
Explanation:Time Limits for Detention under the Mental Health Act
The Mental Health Act (MHA) provides legal frameworks for the detention and treatment of individuals with mental health disorders. Different sections of the MHA allow for varying periods of detention. Here are the time limits for detention under the MHA:
Section 2: 28 days
This section allows for admission for assessment in a non-emergency situation. An approved mental health professional can recommend this based on the advice of two doctors.Section 5(4): 6 hours
This section permits a nurse to detain a patient who is already in the hospital for a further six hours.Section 136: 24 hours
This section allows the police to take a patient to a place of safety if found in a public place. The detention period is up to 24 hours.Section 4: 72 hours
This section is used in an emergency where Section 2 would cause delay. It allows for detention for up to 72 hours.Section 5(2): 72 hours
This section permits a doctor to detain a patient who is already in the hospital for a further 72 hours.Section 3: 6 months
This section allows for admission for treatment for up to six months. It can be renewed to allow for continued treatment.In conclusion, the MHA provides different time limits for detention depending on the circumstances. It is important to follow the appropriate section to ensure the rights of the patient are protected.
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This question is part of the following fields:
- Ethics And Legal
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Question 20
Incorrect
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A 58-year-old man experiences a myocardial infarction (MI) that results in necrosis of the anterior papillary muscle of the right ventricle. This has led to valve prolapse. Which structure is most likely responsible for the prolapse?
Your Answer: Anterior and posterior cusps of the mitral valve
Correct Answer: Anterior and posterior cusps of the tricuspid valve
Explanation:Cusps and Papillary Muscles of the Tricuspid and Mitral Valves
The tricuspid and mitral valves are important structures in the heart that regulate blood flow between the atria and ventricles. These valves are composed of cusps and papillary muscles that work together to ensure proper function.
The tricuspid valve has three cusps: anterior, posterior, and septal. The papillary muscles of the right ventricle attach to these cusps, with the anterior papillary muscle connecting to both the anterior and posterior cusps.
The mitral valve, located between the left atrium and ventricle, has only two cusps: anterior and posterior.
The posterior and septal cusps of the tricuspid valve attach to the posterior papillary muscle of the right ventricle, while the anterior and septal cusps attach to the septal papillary muscle.
Understanding the anatomy and function of these cusps and papillary muscles is crucial in diagnosing and treating heart conditions such as mitral valve prolapse and tricuspid regurgitation.
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This question is part of the following fields:
- Cardiology
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Question 21
Incorrect
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A 20-year-old man has suffered a stab wound to his left upper abdomen, directly below the costal margin in the mid-axillary line. Which organ is the most probable to have been harmed?
Your Answer: Spleen
Correct Answer: Colon
Explanation:Anatomy of Abdominal Organs and Stab Wound Location
The location of a stab wound in the mid-axillary line, immediately inferior to the costal margin, is likely to affect the colon, specifically the splenic flexure of the colon. The spleen can also be affected if the wound is deep enough. Other structures may also be affected depending on the depth and direction of the wound. However, the small intestine, left kidney, spleen, and stomach are unlikely to be affected in this scenario due to their respective locations in the abdomen. It is important to understand the anatomy of abdominal organs to determine potential injuries in cases of trauma.
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This question is part of the following fields:
- Trauma
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Question 22
Incorrect
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A 10-year-old girl is brought to the Emergency department by her father. She claims to have swallowed 20 tablets of ferrous sulphate that she found in the family medicine cabinet.
What are the symptoms of acute iron poisoning?Your Answer: Ataxia
Correct Answer: Gastric haemorrhage
Explanation:Acute Iron Toxicity and Treatment with Desferrioxamine
Acute iron toxicity is a rare occurrence, but it can happen when someone ingests too many iron tablets. These tablets are often brightly colored and can be mistaken for candy, making accidental ingestion more likely. When someone experiences acute iron toxicity, they may suffer from necrotizing gastritis, severe vomiting, gastrointestinal hemorrhage, diarrhea, and circulatory collapse.
Fortunately, there is a treatment for acute iron toxicity. Desferrioxamine is an iron chelating agent that can bind with iron in the body. If the ingested iron is still in the stomach, desferrioxamine can be given enterally via an NG tube to prevent absorption and eliminate the iron-desferrioxamine complex in the feces. If the iron has already been absorbed into the body, desferrioxamine can be given intramuscularly or intravenously to bind with the iron in the intravascular and extravascular fluid compartments. The iron-desferrioxamine complex is then excreted in the urine.
In summary, acute iron toxicity can be a serious condition, but it can be treated with desferrioxamine. It is important to be cautious when taking iron tablets and to keep them out of reach of children to prevent accidental ingestion.
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This question is part of the following fields:
- Pharmacology
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Question 23
Incorrect
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A 32-year-old male with type 1 diabetes presents with pain, swelling, and redness in his left middle finger for the past two days. He experienced this after pricking his finger while gardening and pruning a bush. Despite his diabetic control being reasonable with a HbA1c of 54 mmol/mol (20-46) on basal bolus insulin consisting of Lispro tds and Humulin I in the evenings, he is now diagnosed with cellulitis. On examination, his middle finger is painful, red, and swollen, with the redness extending to the metacarpophalangeal joint. However, his hand movements are intact, and he is clinically stable with normal observations.
What is the most appropriate initial treatment for this patient?Your Answer: Oral penicillin V
Correct Answer: Oral flucloxacillin
Explanation:The patient has digital cellulitis likely caused by Strep. pyogenes or Staph. aureus. Flucloxacillin is the initial treatment, but if there is tendon involvement, IV antibiotics should be initiated. Clindamycin can be used in combination with flucloxacillin for rapid control or in severe cases. Oral antibiotics can be tried if hand movements are intact. The patient should be closely monitored and readmitted for IV antibiotics if there is no improvement within 48 hours.
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This question is part of the following fields:
- Endocrinology
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Question 24
Correct
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A 56-year-old man presents to the Emergency Department with central abdominal pain. The pain started very suddenly, is described as severe and radiates through to his back. He has a past medical history of hypertension. On examination, the patient looks unwell, with some bruising around his flanks.
Investigation Result Normal value
Heart rate (HR) 118 bpm 60–100 bpm
Blood pressure (BP) 98/62 mmHg < 120/80 mmHg
Respiratory rate (RR) 28 breaths/min 12–18 breaths/min
Sats 95% on air 94–98%
Temperature 36 °C 36.1–37.2 °C
There is generalised tenderness upon palpation of the abdomen.
Which of the following is the most likely diagnosis?Your Answer: Ruptured AAA
Explanation:Possible Diagnoses for Abdominal Pain and Bruising
When a patient presents with abdominal pain and bruising, it is important to consider a range of possible diagnoses. In this case, a ruptured abdominal aortic aneurysm (AAA) is the most likely explanation, given the patient’s history and examination findings. This is a serious condition with high mortality, and urgent surgical intervention is required if AAA is suspected. To avoid further complications, blood pressure should be maintained at less than 100 mmHg.
Other potential diagnoses that should be ruled out include pancreatitis, renal artery stenosis, appendicitis, and aortic dissection. Pancreatitis can also cause abdominal pain and bruising, but the patient’s symptoms and signs suggest AAA as the primary concern. Renal artery stenosis typically presents differently and is less likely in this case. Appendicitis can cause central abdominal pain, but it is not the most likely explanation here. Aortic dissection can cause pain radiating to the back, but the location and severity of the pain in this patient do not fit with that diagnosis. Overall, prompt and accurate diagnosis is crucial for effective treatment and management of abdominal pain and bruising.
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This question is part of the following fields:
- Vascular
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Question 25
Correct
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A 50-year-old man presents with a swollen knee. Upon examination, the knee appears red, hot, and has limited range of motion. The patient has no history of prior surgeries and no significant medical history. What is the most suitable test to rule out a septic joint?
Your Answer: Joint aspiration
Explanation:Diagnosis of Joint Sepsis and Acute Gout
When diagnosing joint sepsis or acute gout, it is important to note that a neutrophilia may not always be present. Additionally, serum uric acid levels can be normal, low, or high in both conditions. While x-rays may show advanced sepsis with bony destruction, they are not always sensitive enough to detect early stages of the condition. An MRI is more sensitive, but the gold standard for diagnosis is joint aspiration. However, it is important to note that joint aspiration should not be performed outside of a theatre if the patient has a prosthetic joint. Proper diagnosis is crucial in order to provide appropriate treatment and prevent further complications.
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This question is part of the following fields:
- Surgery
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Question 26
Incorrect
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A 28-year-old woman presents to the Emergency Department with sudden and severe lower abdominal pain and vaginal bleeding that started 2 hours ago. The pain is progressively worsening. Upon examination, she is hypotensive, tachycardic, and apyrexial, with tenderness in the lower abdomen and guarding and rebound. She had a positive pregnancy test a week ago and reports her last menstrual period was 6 weeks ago. An ultrasound scan shows haemoperitoneum and left tubal rupture. The patient has been advised to undergo laparotomy for a ruptured ectopic pregnancy. Which part of the fallopian tube is most likely to rupture due to ectopic pregnancies?
Your Answer: Ampulla
Correct Answer: Isthmus
Explanation:Types of Ectopic Pregnancy in the Fallopian Tube
Ectopic pregnancy, a condition where the fertilized egg implants outside the uterus, can occur in different parts of the Fallopian tube. Here are the different types of ectopic pregnancy in the Fallopian tube and their characteristics:
1. Isthmus – Ectopic pregnancy in the isthmus is rare but can occur. The tube is rigid, making rupture occur earlier than in other parts of the tube.
2. Interstitial part – This is the proximal segment of the tube embedded within the uterine wall. Ectopic pregnancy in this part is very rare and is more likely to occur in women who have had ipsilateral salpingectomy.
3. Ampulla – Ectopic pregnancy occurs most frequently in the ampullary part of the tube, which is relatively wide. Rupture usually occurs about 2 months after the last menstrual period, but it happens later than in the isthmus due to the elasticity of the tube.
4. Fimbrial end – Ectopic pregnancy near the fimbrial end can result in an ovarian pregnancy, which is rare and not associated with pelvic inflammatory disease or an intrauterine device.
5. Cornua – Pregnancy may implant itself in the cornua, which is the opening of the Fallopian tube. Combined with interstitial pregnancies, this represents a small percentage of all ectopic pregnancies.
Knowing the different types of ectopic pregnancy in the Fallopian tube can help in early detection and management of this potentially life-threatening condition.
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This question is part of the following fields:
- Gynaecology
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Question 27
Correct
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A 45-year-old male visits his doctor complaining of bone pain that has been bothering him for a few weeks. He has also noticed a decline in his hearing ability lately. Upon examination, his blood work reveals an isolated increase in alkaline phosphate levels. Based on this information, which bone is most likely causing his pain?
Your Answer: Pelvis
Explanation:Paget’s disease of the bone typically impacts the skull, spine/pelvis, and the long bones in the lower extremities.
Based on the symptoms presented, it is likely that this patient is suffering from Paget’s disease of the bone. A helpful way to remember which bones are most commonly affected by this condition is to imagine a line running down the center of the patient’s body. The bones on either side of this line, including the skull, vertebral bones, pelvis, femur, and tibia, are frequently impacted by Paget’s disease. In contrast, the radius, humerus, carpal bones, and rib bones are less commonly affected.
Understanding Paget’s Disease of the Bone
Paget’s disease of the bone is a condition characterized by increased and uncontrolled bone turnover. It is believed to be caused by excessive osteoclastic resorption followed by increased osteoblastic activity. Although it is a common condition, affecting 5% of the UK population, only 1 in 20 patients experience symptoms. The most commonly affected areas are the skull, spine/pelvis, and long bones of the lower extremities. Predisposing factors include increasing age, male sex, northern latitude, and family history.
Symptoms of Paget’s disease include bone pain, particularly in the pelvis, lumbar spine, and femur. The stereotypical presentation is an older male with bone pain and an isolated raised alkaline phosphatase (ALP). Classical, untreated features include bowing of the tibia and bossing of the skull. Diagnosis is made through blood tests, which show raised ALP, and x-rays, which reveal osteolysis in early disease and mixed lytic/sclerotic lesions later.
Treatment is indicated for patients experiencing bone pain, skull or long bone deformity, fracture, or periarticular Paget’s. Bisphosphonates, either oral risedronate or IV zoledronate, are the preferred treatment. Calcitonin is less commonly used now. Complications of Paget’s disease include deafness, bone sarcoma (1% if affected for > 10 years), fractures, skull thickening, and high-output cardiac failure.
Overall, understanding Paget’s disease of the bone is important for early diagnosis and management of symptoms and complications.
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This question is part of the following fields:
- Musculoskeletal
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Question 28
Incorrect
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You are requested to assess a newborn on the post-natal ward 12 hours after a vaginal delivery. The midwife reports that the mother tested positive for group B streptococcus. During your examination, you observe a yellowish tint to the skin. What would be the most suitable course of action to take next?
Your Answer: Reassess after 24 hours of age
Correct Answer: Measure serum bilirubin within 2 hours
Explanation:Due to the baby’s age of less than 24 hours, there is a high risk of severe hyperbilirubinaemia. It is crucial to urgently measure their serum bilirubin levels within 2 hours, as using a transcutaneous bilirubinometer is not suitable at this stage. While phototherapy can be used to treat jaundice, it is important to first measure the serum bilirubin levels to determine if exchange transfusion is necessary. This information is based on the NICE Guideline CG98 for Jaundice in newborn babies under 28 days.
Jaundice in newborns can occur within the first 24 hours of life and is always considered pathological. The causes of jaundice during this period include rhesus and ABO haemolytic diseases, hereditary spherocytosis, and glucose-6-phosphodehydrogenase deficiency. On the other hand, jaundice in neonates from 2-14 days is common and usually physiological, affecting up to 40% of babies. This type of jaundice is due to a combination of factors such as more red blood cells, fragile red blood cells, and less developed liver function. Breastfed babies are more likely to develop this type of jaundice.
If jaundice persists after 14 days (21 days for premature babies), a prolonged jaundice screen is performed. This includes tests for conjugated and unconjugated bilirubin, direct antiglobulin test, thyroid function tests, full blood count and blood film, urine for MC&S and reducing sugars, and urea and electrolytes. Prolonged jaundice can be caused by biliary atresia, hypothyroidism, galactosaemia, urinary tract infection, breast milk jaundice, prematurity, and congenital infections such as CMV and toxoplasmosis. Breast milk jaundice is more common in breastfed babies and is thought to be due to high concentrations of beta-glucuronidase, which increases the intestinal absorption of unconjugated bilirubin. Prematurity also increases the risk of kernicterus.
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This question is part of the following fields:
- Paediatrics
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Question 29
Incorrect
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A 55-year-old sheep farmer who recently arrived in the UK from Iran presents with increasing right upper quadrant (RUQ) pain of two week's duration. She also complains of tiredness and of being generally unwell for several months. She has not experienced a change in her bowel habit, weight loss, or night sweats.
Upon examination, her temperature is 37.8ºC, heart rate 80/min, blood pressure 135/90 mmHg, respiratory rate 18/min. She is mildly jaundiced with RUQ pain and the liver edge is palpable 3 cm below the costal margin.
Blood tests revealed raised eosinophils and her LFTs were as follows:
- Bilirubin 30 µmol/l
- ALP 190 u/l
- ALT 36 u/l
An ultrasound scan of her liver demonstrated a 7 cm cystic lesion. The scan was technically challenging but there appeared to be daughter cysts present.
What is the recommended next investigation to carry out?Your Answer: Serum cancer markers
Correct Answer: CT abdomen
Explanation:CT is the most appropriate investigation for hydatid cysts, while percutaneous aspiration is not recommended.
When dealing with cystic liver lesions, there are several possibilities to consider, such as simple cysts, cancers, abscesses, and microabscesses. Depending on the situation, any of the available options could be a valid diagnostic tool. However, in this case, the symptoms and findings suggest a hydatid cyst as the most likely cause. The patient’s location and occupation increase the likelihood of a parasitic infection, and the presence of eosinophilia and daughter cysts on ultrasound further support this diagnosis. To differentiate between hydatid cysts and amoebic abscesses, CT is the preferred imaging modality.
It is crucial to note that percutaneous aspiration of hydatid cysts is not recommended due to the risk of triggering anaphylaxis and spreading daughter cysts throughout the abdomen.
Hydatid Cysts: Causes, Symptoms, and Treatment
Hydatid cysts are caused by the tapeworm parasite Echinococcus granulosus and are endemic in Mediterranean and Middle Eastern countries. These cysts are enclosed in an outer fibrous capsule containing multiple small daughter cysts that act as allergens, triggering a type 1 hypersensitivity reaction. The majority of cysts, up to 90%, occur in the liver and lungs and can be asymptomatic or symptomatic if the cysts are larger than 5 cm in diameter. The bursting of cysts, infection, and organ dysfunction, such as biliary, bronchial, renal, and cerebrospinal fluid outflow obstruction, can cause morbidity. In biliary rupture, the classical triad of biliary colic, jaundice, and urticaria may be present.
Imaging, such as ultrasound, is often used as a first-line investigation, while CT is the best investigation to differentiate hydatid cysts from amoebic and pyogenic cysts. Serology is also useful for primary diagnosis and for follow-up after treatment, with a wide variety of different antibody/antigen tests available. Surgery is the mainstay of treatment, but it is crucial that the cyst walls are not ruptured during removal, and the contents are sterilized first.
Overall, hydatid cysts can cause significant morbidity if left untreated, and early diagnosis and treatment are essential for a successful outcome.
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This question is part of the following fields:
- Surgery
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Question 30
Incorrect
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A 29-year-old woman presents to the clinic with concerns about her pregnancy. She is currently at 30 weeks gestation and reports that her pregnancy has been going smoothly thus far. However, over the past few days, she has noticed a decrease in fetal movement. She denies any recent illnesses or feeling unwell and has no significant medical history. On obstetric abdominal examination, there are no notable findings and the patient appears to be in good health. What is the recommended initial management in this case?
Your Answer: Cardiotocography for 20 minutes
Correct Answer: Handheld Doppler
Explanation:When a pregnant woman reports reduced fetal movements after 28 weeks of gestation, the first step recommended by the RCOG guidelines is to use a handheld Doppler to confirm the fetal heartbeat. If the heartbeat cannot be detected, an ultrasound should be offered immediately. However, if a heartbeat is detected, cardiotocography should be used to monitor the heart rate for 20 minutes. Fetal blood sampling is not necessary in this situation. Referral to a fetal medicine unit would only be necessary if no movements had been felt by 24 weeks.
Understanding Reduced Fetal Movements
Introduction:
Reduced fetal movements can indicate fetal distress and are a response to chronic hypoxia in utero. This can lead to stillbirth and fetal growth restriction. It is believed that placental insufficiency may also be linked to reduced fetal movements.Physiology:
Quickening is the first onset of fetal movements, which usually occurs between 18-20 weeks gestation and increases until 32 weeks gestation. Multiparous women may experience fetal movements sooner. Fetal movements should not reduce towards the end of pregnancy. There is no established definition for what constitutes reduced fetal movements, but less than 10 movements within 2 hours (in pregnancies past 28 weeks gestation) is an indication for further assessment.Epidemiology:
Reduced fetal movements affect up to 15% of pregnancies, with 3-5% of pregnant women having recurrent presentations with RFM. Fetal movements should be established by 24 weeks gestation.Risk factors for reduced fetal movements:
Posture, distraction, placental position, medication, fetal position, body habitus, amniotic fluid volume, and fetal size can all affect fetal movement awareness.Investigations:
Fetal movements are usually based on maternal perception, but can also be objectively assessed using handheld Doppler or ultrasonography. Investigations are dependent on gestation at onset of RFM. If concern remains, despite normal CTG, urgent (within 24 hours) ultrasound can be used.Prognosis:
Reduced fetal movements can represent fetal distress, but in 70% of pregnancies with a single episode of reduced fetal movement, there is no onward complication. However, between 40-55% of women who suffer from stillbirth experience reduced fetal movements prior to diagnosis. Recurrent RFM requires further investigations to consider structural or genetic fetal abnormalities. -
This question is part of the following fields:
- Obstetrics
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