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Practice targeted AMC-style multiple-choice questions on pediatrics.

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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A previously healthy 3-year-old boy presents with colicky abdominal pain and non-bilious vomiting. Physical exam reveals a palpable abdominal mass in the RUQ. An ultrasound is performed, revealing the finding shown. What is the MOST likely lead point?

A. Polyp
B. Appendix
C. Lymphoma
D. Ileocolic valve
E. Meckel's diverticulum
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 3-year-old boy presents to the emergency department with a 24-hour history of intermittent, severe abdominal pain. His mother reports episodes where he cries inconsolably, draws his knees to his chest, and then seems to recover briefly before the pain returns. He has also passed a stool mixed with mucus and blood, described as 'red currant jelly'. On examination, the child is afebrile, but appears pale and lethargic. Abdominal palpation reveals a sausage-shaped mass in the right upper quadrant. An ultrasound is performed, and a representative image is shown. Assuming the diagnosis is confirmed, what is the MOST appropriate next step in management?

A. Stool culture and sensitivity testing
B. Oral rehydration and analgesia
C. Air enema under radiological guidance
D. Intravenous antibiotics and observation
E. Surgical resection of the affected bowel segment
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Neuroblastoma, CT of the abdomen
Image by RadsWiki CC BY-SA 3.0 · Source

A 4-year-old boy presents with a 3-week history of decreased appetite, lethargy, and intermittent abdominal pain. His parents note his abdomen seems larger. Vitals are stable. On examination, a firm, irregular mass is palpable in the upper abdomen. Blood work shows mild anaemia. The provided image is an axial CT slice of the abdomen. Considering the clinical presentation and the findings demonstrated in the image, which of the following investigations is the MOST appropriate initial step to support the suspected diagnosis?

A. Bone marrow biopsy
B. Fine needle aspiration of the mass
C. Urinary catecholamine metabolites (e.g., VMA, HVA)
D. Repeat CT scan with contrast
E. Serum alpha-fetoprotein
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A 10-year-old boy is brought to the GP by his parents, who report difficulties with attention and hyperactivity at school and home for the past 6 months. Which of the following is the MOST appropriate initial step in managing this child?

A. Referral to a paediatrician or child psychiatrist for comprehensive assessment
B. Initiation of a trial of stimulant medication
C. Advising the parents to implement stricter discipline at home
D. Recommending behavioural therapy alone
E. Suggesting dietary changes, such as eliminating sugar
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 3-year-old boy presents with sudden onset, intermittent, severe abdominal pain, vomiting, and lethargy. On examination, he is pale and has a palpable mass in the right upper quadrant. Vitals are stable. An ultrasound is performed, shown above. Based on the clinical presentation and the provided image, what is the most appropriate next step in the management of this patient?

A. Urgent surgical consultation for laparotomy
B. Administration of broad-spectrum antibiotics
C. CT scan of the abdomen and pelvis
D. Admission for observation and serial abdominal exams
E. Air enema reduction
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A 3-year-old boy is brought to the emergency department by his parents due to a high fever and irritability. He has had a runny nose and cough for the past two days. On examination, he is lethargic and has a bulging fontanelle. A lumbar puncture is performed, and the cerebrospinal fluid (CSF) analysis shows elevated protein, low glucose, and a high white cell count with a predominance of neutrophils. What is the most likely diagnosis?

A. Tuberculous meningitis
B. Bacterial meningitis
C. Subdural hematoma
D. Viral meningitis
E. Encephalitis
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A 10-year-old boy presents to his GP with a chronic, intensely itchy rash affecting the flexural areas of his elbows and knees, as well as his neck. His parents report that he has had this condition on and off since infancy, with periods of remission and exacerbation. He also has a history of allergic rhinitis and asthma. On examination, the skin in the affected areas is dry, lichenified, and excoriated. There are also scattered papules and plaques. The patient reports significant sleep disturbance due to the itch. Topical corticosteroids have provided temporary relief in the past, but the rash flares up again soon after stopping treatment. Which of the following is the MOST appropriate next step in managing this patient's atopic dermatitis?

A. Refer the patient to a dermatologist for systemic immunosuppressant therapy without attempting further topical treatments.
B. Initiate treatment with a topical calcineurin inhibitor such as tacrolimus or pimecrolimus.
C. Recommend oral antihistamines as the sole treatment for the itch.
D. Advise strict avoidance of all potential allergens based on unproven allergy testing.
E. Prescribe a potent topical corticosteroid for long-term daily use.
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Pyloric stenosis as seen on ultrasound in a 6 week old
Image by Dr Laughlin Dawes CC BY-SA 4.0 · Source

A 6-week-old male infant presents to the emergency department with a 2-week history of progressively worsening non-bilious vomiting, which has become projectile over the past few days. His parents report he is feeding eagerly but vomits most feeds shortly after completion. He has had fewer wet nappies than usual and appears more lethargic. On examination, he is irritable but consolable. His weight is below the 3rd percentile, having dropped from the 10th percentile at birth. Vital signs are: Temperature 36.8°C, Heart Rate 155 bpm, Respiratory Rate 40 bpm, Blood Pressure 85/50 mmHg, Oxygen Saturation 98% on room air. Capillary refill time is 3 seconds. Abdominal examination reveals a soft, non-distended abdomen with active bowel sounds; no palpable masses are appreciated. Initial blood gas shows pH 7.52, pCO2 40 mmHg, Bicarbonate 32 mmol/L, Na+ 132 mmol/L, K+ 3.0 mmol/L, Cl- 88 mmol/L. A point-of-care ultrasound was performed, and the image provided was obtained. Considering the clinical presentation, the laboratory results, and the findings demonstrated in the image, which of the following represents the most appropriate immediate therapeutic intervention?

A. Intravenous administration of 5% dextrose in 0.45% sodium chloride.
B. Oral rehydration therapy with an electrolyte solution.
C. Urgent surgical consultation for pyloromyotomy without prior fluid resuscitation.
D. Placement of a nasogastric tube for continuous gastric drainage.
E. Intravenous administration of 0.9% sodium chloride with added potassium chloride.
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Neuroblastoma, CT of the abdomen
Image by RadsWiki CC BY-SA 3.0 · Source

A 3-year-old presents with a 2-month history of increasing abdominal distension and intermittent pain. Physical examination reveals a firm, non-tender mass in the upper abdomen. Blood tests show mild anaemia. Vitals are stable. This CT scan was performed as part of the initial workup. Considering the clinical presentation and the findings demonstrated in the provided image, which of the following investigations is the most critical next step for accurate staging and risk stratification to guide appropriate management in this paediatric patient?

A. Bone marrow aspirate and trephine biopsy
B. Repeat CT scan of the abdomen in 3 months
C. Urgent surgical resection of the mass
D. Genetic testing for WT1 gene mutation
E. Initiation of empirical chemotherapy
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A previously well 3-year-old boy presents to the emergency department with a 12-hour history of sudden onset, intermittent, severe, colicky abdominal pain, associated with non-bilious vomiting. Between episodes, he appears lethargic and pale. His vital signs are stable: HR 110, BP 90/60, RR 24, Temp 37.2. Abdominal examination reveals mild distension and tenderness, but no guarding or rebound. Bowel sounds are present. A point-of-care ultrasound is performed by the emergency physician. Considering the clinical presentation, the patient's current stable vital signs, and the specific findings demonstrated in the provided ultrasound image, which of the following represents the single most appropriate immediate next step in the management of this patient in an Australian tertiary paediatric centre?

A. Proceed directly to surgical exploration.
B. Attempt pneumatic or hydrostatic reduction under fluoroscopic guidance.
C. Obtain a CT scan of the abdomen and pelvis.
D. Administer IV fluids and observe for resolution.
E. Discharge home with pain relief and follow-up.
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Pyloric stenosis as seen on ultrasound in a 6 week old
Image by Dr Laughlin Dawes CC BY-SA 4.0 · Source

A 5-week-old male presents with projectile vomiting. Ultrasound (shown). What electrolyte abnormality is MOST likely?

A. Hyperchloremic metabolic acidosis
B. Hyperkalemia
C. Hyponatremia
D. Hypophosphatemia
E. Hypochloremic metabolic alkalosis
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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 3-year-old child is presented to the general practitioner by their parents who are concerned about the appearance of their child's umbilicus, as depicted in the accompanying image. The child is reported to be entirely asymptomatic, feeding and playing normally, with no history of pain, discomfort, or vomiting. Physical examination reveals normal vital signs and a soft, non-tender abdomen with no signs of obstruction. Considering the clinical presentation and the finding shown, what is the most appropriate initial management plan for this child?

A. Order an abdominal ultrasound scan to evaluate the contents and size of the defect.
B. Arrange an urgent consultation with a paediatric surgeon for immediate operative repair.
C. Prescribe a course of simple analgesia and schedule a routine follow-up appointment in one week.
D. Recommend the application of a firm abdominal binder or tape over the affected area to prevent enlargement.
E. Provide reassurance to the parents regarding the benign nature and likelihood of spontaneous resolution, advising them on signs requiring further assessment.
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A 7-year-old boy is brought to his GP by his parents, who are concerned about his behaviour at school and at home. They report that he has difficulty paying attention in class, often fidgets and squirms in his seat, and frequently interrupts others. At home, he struggles to follow instructions, loses things easily, and seems forgetful. The teacher has also noted that he has difficulty staying on task and often blurts out answers before the question is finished. The parents deny any history of significant medical illness or developmental delay. On examination, the boy appears energetic and talkative, but is cooperative with the assessment. Which of the following is the most appropriate next step in the evaluation of this child?

A. Referral to a paediatrician or child psychiatrist for a comprehensive ADHD assessment
B. Trial of a stimulant medication to assess response
C. Encouraging the parents to implement a strict reward system at home
D. Request for formal cognitive testing to rule out learning disabilities
E. Reassurance and advice to parents on behavioural management techniques
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Neuroblastoma, CT of the abdomen
Image by RadsWiki CC BY-SA 3.0 · Source

A 4-year-old boy presents with left flank pain and a palpable abdominal mass. His mother reports decreased appetite and recent weight loss. A CT scan of the abdomen is performed (image attached). What is the MOST likely diagnosis?

A. Lymphoma
B. Hepatoblastoma
C. Wilms tumor
D. Renal cell carcinoma
E. Neuroblastoma
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A 3-year-old child presents to the clinic with a history of recurrent wheezing episodes, especially during viral infections. What is the most common cause of wheezing in children under 5 years of age?

A. Asthma
B. Foreign body aspiration
C. Viral bronchiolitis
D. Congenital heart disease
E. Cystic fibrosis
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Hypertrophic pyloric stenosis
Image by Adityagupta95 CC0 1.0 · Source

A 3-week-old male infant is brought to the emergency department by his parents due to persistent, non-bilious vomiting after each feeding for the past week. The vomiting has become increasingly forceful. The infant appears mildly dehydrated, with slightly decreased skin turgor. His weight is below the 5th percentile for his age. An abdominal X-ray is unremarkable. Given the clinical presentation, the physician orders further imaging, the results of which are shown. What is the MOST appropriate next step in the management of this patient?

A. Perform an upper endoscopy with biopsy
B. Initiate a trial of thickened feeds
C. Start oral erythromycin
D. Surgical pyloromyotomy
E. Administer intravenous antibiotics
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Hypertrophic pyloric stenosis
Image by Adityagupta95 CC0 1.0 · Source

A 4-week-old male presents with non-bilious emesis. An upper GI series is performed (image shown). What acid-base abnormality is MOST likely?

A. Respiratory alkalosis
B. Hyperchloremic metabolic acidosis
C. Normal acid-base status
D. Respiratory acidosis
E. Hypochloremic metabolic alkalosis
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Hypertrophic pyloric stenosis
Image by Adityagupta95 CC0 1.0 · Source

A 3-week-old male presents with projectile vomiting. Upper GI series (image shown). What electrolyte abnormality is MOST likely?

A. Hypochloremic metabolic alkalosis
B. Hyperkalemia
C. Hypophosphatemia
D. Hyperchloremic metabolic acidosis
E. Hyponatremia
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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 6-month-old infant presents for a routine check-up. The mother reports the infant is feeding well and has normal bowel movements. On examination, the infant is active and alert with normal vital signs. The abdomen is soft and non-tender. The image shows the infant's abdomen. What is the most appropriate next step in management?

A. Order an abdominal ultrasound to assess for bowel obstruction
B. Reassurance and observation
C. Obtain a complete blood count to rule out infection
D. Referral to a pediatric surgeon for elective repair
E. Initiate a trial of topical corticosteroids
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Neuroblastoma, CT of the abdomen
Image by RadsWiki CC BY-SA 3.0 · Source

A 4-year-old child is brought to the emergency department with a 3-week history of increasing abdominal distension, intermittent pain, and decreased activity. Parents also report occasional flushing episodes and unexplained fevers. On examination, a large, firm, irregular mass is palpable in the upper abdomen, extending across the midline. Vital signs are stable, and routine blood tests, including full blood count, electrolytes, and liver function tests, are within normal limits. An abdominal CT scan is performed (image provided). Based on the findings demonstrated in the image and the clinical presentation, which of the following investigations is most critical for accurate staging and risk stratification in this likely diagnosis?

A. Serum alpha-fetoprotein and beta-human chorionic gonadotropin levels
B. Upper gastrointestinal series with small bowel follow-through
C. Iodine-123 metaiodobenzylguanidine (MIBG) scan
D. Renal biopsy
E. Colonoscopy
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 3-year-old boy presents with sudden onset, intermittent, severe abdominal pain, vomiting, and lethargy. On examination, he is pale but haemodynamically stable. An abdominal ultrasound is performed. Based on the clinical presentation and the provided image, what is the most appropriate next step in the management of this patient?

A. Urgent surgical consultation for laparotomy
B. Nasogastric tube insertion and IV fluids only
C. Air enema reduction
D. Observation with serial abdominal examinations
E. CT abdomen and pelvis
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Hypertrophic pyloric stenosis
Image by Adityagupta95 CC0 1.0 · Source

A 3-week-old male infant presents with persistent, non-bilious projectile vomiting after each feed. He appears hungry and eagerly accepts the bottle, but vomits shortly after. On examination, mild dehydration is noted. An abdominal X-ray is ordered, the relevant image is attached. What is the MOST appropriate next step in management?

A. Perform an upper endoscopy
B. Administer intravenous ondansetron
C. Initiate a course of erythromycin
D. Surgical pyloromyotomy
E. Start a trial of thickened feeds
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A 3-year-old child presents to the emergency department with a sudden onset of cough, wheezing, and difficulty breathing after playing with small toys. The child is in mild respiratory distress, with a respiratory rate of 40 breaths per minute and oxygen saturation of 92% on room air. On auscultation, there are decreased breath sounds on the right side with wheezing. The child has no fever, and there is no history of recent illness. What is the most likely cause of these symptoms?

A. Foreign body aspiration
B. Bacterial pneumonia
C. Viral bronchiolitis
D. Asthma exacerbation
E. Allergic reaction
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Neuroblastoma, CT of the abdomen
Image by RadsWiki CC BY-SA 3.0 · Source

A 3-year-old presents with abdominal distension and bone pain. An abdominal CT is performed (image attached). Which of the following is the MOST appropriate initial investigation to confirm the suspected diagnosis?

A. Urine catecholamine metabolites
B. Liver function tests
C. Bone marrow biopsy
D. Alpha-fetoprotein level
E. Complete blood count
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Hypertrophic pyloric stenosis
Image by Adityagupta95 CC0 1.0 · Source

A 6-week-old male infant presents with a 2-week history of progressively worsening projectile non-bilious vomiting after feeds. He has lost weight and appears lethargic. Initial bloods show a hypochloremic, hypokalaemic metabolic alkalosis. After fluid resuscitation, the image is obtained. What is the most appropriate definitive management for this patient?

A. Further imaging with abdominal ultrasound
B. Placement of nasogastric tube for gastric decompression
C. Trial of medical management with atropine
D. Discharge home with thickened feeds and anti-reflux medication
E. Surgical pyloromyotomy
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Neuroblastoma, CT of the abdomen
Image by RadsWiki CC BY-SA 3.0 · Source

A 4-year-old presents with abdominal distension and back pain for 2 months. Exam reveals a firm, fixed abdominal mass. Vitals are normal. An abdominal CT is performed (axial view shown). Which lab finding would MOST strongly support the suspected diagnosis?

A. Elevated urine vanillylmandelic acid (VMA)
B. Elevated serum lactate dehydrogenase (LDH)
C. Elevated alpha-fetoprotein (AFP)
D. Elevated urine urobilinogen
E. Elevated serum amylase
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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 6-month-old infant presents for a routine check-up. The mother reports the infant is feeding well and has normal bowel movements. On examination, the infant is active and alert with normal vital signs. The abdomen is soft and non-tender. The image shows a finding on the abdominal exam. What is the most appropriate next step in management?

A. Application of an abdominal binder
B. Empiric antibiotic treatment
C. Initiation of diuretic therapy
D. Reassurance and observation
E. Immediate surgical referral
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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 14-month-old child is brought to the general practitioner for a routine check-up and immunisations. The parents express mild concern about a bulge they have noticed around the child's navel, which seems more prominent when the child is crying or straining. They report it is easily pushed back in and does not appear to cause the child any pain or discomfort. The child is otherwise thriving, with normal feeding, bowel movements, and developmental progress. On physical examination, the child is alert and interactive. Vital signs are within normal limits for age. Abdominal examination reveals no distension or tenderness. The finding illustrated in the image is noted. Based on this clinical presentation and examination finding, what is the most appropriate initial management plan?

A. Refer the child for urgent surgical consultation due to the presence of a visible abdominal wall defect.
B. Arrange for an abdominal ultrasound scan to assess the contents and size of the defect.
C. Refer the child to a paediatric gastroenterologist to investigate potential underlying causes of increased intra-abdominal pressure.
D. Provide reassurance to the parents regarding the benign nature of the finding and advise observation, explaining the likelihood of spontaneous closure.
E. Recommend the application of a supportive abdominal binder or tape to facilitate closure of the defect.
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 2-year-old boy presents with abdominal pain and vomiting. An ultrasound is performed, as shown. What is the MOST likely lead point for this condition?

A. Ileocolic junction
B. Polyp
C. Appendix
D. Meckel's diverticulum
E. Duodenal duplication cyst
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A 14-year-old girl living alone presents with a positive urine pregnancy test. She states she was raped 6 months ago and wishes to terminate the pregnancy. What is the next appropriate step?

A. Refer her to a gynaecologist.
B. Inform police.
C. Send her to the women's home.
D. Terminate the pregnancy.
E. Inform child protection services.
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Neuroblastoma, CT of the abdomen
Image by RadsWiki CC BY-SA 3.0 · Source

A 3-year-old boy presents to the emergency department with a one-week history of abdominal pain, decreased appetite, and irritability. His parents also report that he has been increasingly tired and pale. On examination, the child is noted to have a palpable abdominal mass. A CT scan of the abdomen is performed, the axial view is shown. Based on the image and clinical presentation, which of the following is the MOST appropriate next step in management?

A. Surgical resection of the mass
B. Measurement of urine vanillylmandelic acid (VMA) and homovanillic acid (HVA) levels
C. Referral for immediate liver biopsy
D. Observation with serial abdominal examinations
E. Initiation of broad-spectrum antibiotics
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A 10-year-old boy with a history of asthma presents to the emergency department with wheezing and shortness of breath. His mother reports that he has been using his salbutamol inhaler more frequently over the past two days. On examination, he has a respiratory rate of 28 breaths per minute, and his oxygen saturation is 92% on room air. What is the most appropriate initial management step?

A. Administer nebulized salbutamol
B. Administer intravenous magnesium sulfate
C. Provide supplemental oxygen
D. Increase the dose of inhaled corticosteroids
E. Start oral corticosteroids
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 3-year-old boy presents with sudden onset, intermittent, severe abdominal pain, vomiting, and lethargy. Examination reveals a palpable mass. Vitals stable. Ultrasound performed. Based on the clinical presentation and the provided image, what is the most appropriate next step in management?

A. Urgent surgical exploration
B. Pneumatic reduction under fluoroscopy
C. Abdominal CT scan with contrast
D. Admission for observation and IV fluids
E. Administration of broad-spectrum antibiotics
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Pyloric stenosis as seen on ultrasound in a 6 week old
Image by Dr Laughlin Dawes CC BY-SA 4.0 · Source

A 5-week-old male presents with non-bilious projectile vomiting. An ultrasound is performed (shown). What acid-base disturbance is MOST likely?

A. Hypochloremic metabolic alkalosis
B. Hyperchloremic metabolic acidosis
C. Respiratory acidosis
D. Respiratory alkalosis
E. Normal acid-base balance
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Pyloric stenosis as seen on ultrasound in a 6 week old
Image by Dr Laughlin Dawes CC BY-SA 4.0 · Source

A 6-week-old infant presents with a 1-week history of increasing frequency of non-bilious, projectile vomiting occurring shortly after feeds. He has lost some weight since his last check-up. Examination is otherwise unremarkable. An ultrasound is performed, shown in the image. Based on the clinical presentation and the provided image, which of the following electrolyte abnormalities is the most likely consequence if this condition remains untreated?

A. Hypernatremic metabolic acidosis
B. Hyponatremic respiratory alkalosis
C. Hypochloremic metabolic alkalosis
D. Hypokalemic respiratory acidosis
E. Hypercalcemic metabolic alkalosis
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 3-year-old boy presents with sudden onset intermittent severe abdominal pain, vomiting, and lethargy. On examination, he is pale but haemodynamically stable. Abdominal examination reveals a palpable mass in the right upper quadrant. An ultrasound is performed (image provided). What is the most appropriate next step in management?

A. Administration of broad-spectrum antibiotics
B. Admission for observation and IV fluids
C. Abdominal CT scan with contrast
D. Immediate surgical exploration
E. Air or hydrostatic enema reduction
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Neuroblastoma, CT of the abdomen
Image by RadsWiki CC BY-SA 3.0 · Source

A 3-year-old presents with abdominal distension and bone pain. The provided image was obtained. What is the MOST likely source of the elevated urine HVA and VMA?

A. Hepatocytes
B. Adrenal cortical cells
C. Renal tubular cells
D. Neural crest cells
E. Pancreatic islet cells
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Pyloric stenosis as seen on ultrasound in a 6 week old
Image by Dr Laughlin Dawes CC BY-SA 4.0 · Source

A 6-week-old male infant presents with a 1-week history of progressively worsening non-bilious vomiting, often projectile, occurring shortly after feeds. His parents report he is constantly hungry and irritable but has had poor weight gain. On examination, he is alert but appears thin. Vital signs are stable. Abdominal examination is soft, non-tender, with no palpable mass. An abdominal ultrasound is performed, the image of which is shown. Considering the clinical presentation and the findings depicted, what is the most appropriate initial management strategy?

A. Referral to a paediatric gastroenterologist for further investigation
B. Discharge home with advice on smaller, more frequent feeds
C. Urgent upper gastrointestinal contrast study
D. Surgical pyloromyotomy after fluid and electrolyte correction
E. Trial of antiemetic medication and thickened feeds
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A 10-year-old boy with a known history of asthma presents to the emergency department. He developed symptoms three days after a viral upper respiratory tract infection. On examination, he is tachypnoeic (respiratory rate 48 breaths/min), tachycardic (heart rate 130 bpm), and hypoxic with an oxygen saturation of 91% on room air. He is speaking only in short phrases but remains alert and is afebrile. Auscultation reveals a widespread wheeze throughout his chest. A COVID swab performed yesterday was negative. Which investigation is the most appropriate next step in the immediate management of this patient?

A. Full Blood Count (FBC)
B. No further diagnostics are required immediately.
C. Chest X-ray
D. Peak Expiratory Flow (PEF) measurement
E. Arterial Blood Gas (ABG)
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A 6-year-old child presents with intensely itchy, small, fluid-filled blisters on their hands and feet, especially between the fingers and toes. The lesions are linear and excoriated. Multiple family members have similar symptoms. What is the most likely diagnosis?

A. Scabies
B. Chickenpox
C. Hand, foot, and mouth disease
D. Atopic dermatitis
E. Contact dermatitis
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Pyloric stenosis as seen on ultrasound in a 6 week old
Image by Dr Laughlin Dawes CC BY-SA 4.0 · Source

A 6-week-old male infant presents with a 1-week history of progressively worsening non-bilious vomiting, often projectile, occurring shortly after feeds. His parents report he is constantly hungry and irritable but has had poor weight gain. On examination, he is alert but appears thin. Vital signs are stable. Abdominal examination is soft, non-tender, with no palpable mass. An abdominal ultrasound is performed, the image of which is shown. Considering the clinical presentation and the findings depicted, what is the most appropriate definitive management strategy after initial fluid and electrolyte correction?

A. Trial of antiemetic medication
B. Laparoscopic pyloromyotomy
C. Barium meal study
D. Discharge home with feeding advice
E. Endoscopic balloon dilation
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A 5-year-old girl presents with an itchy bottom at night, worse at night, suggestive of threadworm infection. What is the best treatment for her infection in the Australian context?

A. Advise dietary changes, such as reducing sugar intake, as the primary treatment.
B. Recommend applying a topical anti-itch cream to the perianal area.
C. Treat only the affected child with a single dose of pyrantel.
D. Reassure the parents that this is common and has low morbidity, requiring no treatment.
E. Treat the whole family with pyrantel or mebendazole, and repeat in 2 weeks.
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 3-year-old boy presents with intermittent severe abdominal pain, vomiting, and lethargy. On examination, he is afebrile with a soft but slightly distended abdomen. An ultrasound is performed (image provided). Based on the clinical presentation and the image findings, what is the most appropriate next step in the management of this patient?

A. Pneumatic reduction under fluoroscopy
B. Admission for observation and IV fluids
C. Discharge home with pain relief
D. CT abdomen and pelvis
E. Urgent surgical exploration
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 3-year-old boy presents to the emergency department with a 12-hour history of intermittent, severe abdominal pain, drawing his legs up to his chest. He has vomited several times. His vital signs are stable: HR 110, BP 95/60, RR 24, Temp 37.2°C. On examination, he is irritable but comfortable between episodes of pain. His abdomen is soft but mildly distended. A focused abdominal ultrasound is performed, yielding the image provided. Based on the clinical presentation and the findings shown, what is the most appropriate next step in the management of this patient?

A. Pneumatic reduction under fluoroscopy
B. Abdominal CT scan with contrast
C. Admission for observation and serial abdominal exams
D. Immediate surgical consultation for laparotomy
E. Administration of broad-spectrum intravenous antibiotics
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Neuroblastoma, CT of the abdomen
Image by RadsWiki CC BY-SA 3.0 · Source

A 3-year-old presents with abdominal distension, irritability, and periorbital ecchymosis. Examination reveals a firm, irregular abdominal mass. The provided image is an axial CT slice. Considering the clinical presentation and the findings demonstrated in the image, which of the following biochemical markers is MOST likely to be significantly elevated?

A. Serum CA-125
B. Urinary metanephrines
C. Urinary vanillylmandelic acid (VMA) and homovanillic acid (HVA)
D. Serum alpha-fetoprotein (AFP)
E. Serum lactate dehydrogenase (LDH)
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 3-year-old boy presents with a 12-hour history of intermittent, severe abdominal pain, drawing his legs up to his chest. He has vomited several times. His vital signs are stable: HR 110, BP 95/60, RR 24, Temp 37.2°C. On examination, he is irritable but comfortable between episodes of pain. His abdomen is soft but mildly distended. A focused abdominal ultrasound is performed, yielding the image provided. Based on the clinical presentation and the findings shown, what is the most appropriate initial therapeutic intervention?

A. Intravenous fluid resuscitation and pain control
B. Administer a nasogastric tube for decompression and observe
C. Air or hydrostatic enema under fluoroscopic guidance
D. Obtain a CT scan of the abdomen
E. Urgent surgical exploration
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 3-year-old boy presents with sudden onset intermittent severe abdominal pain, vomiting, and lethargy. On examination, he is pale but haemodynamically stable. Abdominal examination reveals a palpable mass in the right upper quadrant. An ultrasound is performed (image provided). What is the most appropriate next step in management?

A. Admission for observation and IV fluids
B. Air or hydrostatic enema reduction
C. Urgent surgical exploration
D. Abdominal CT scan with contrast
E. Intravenous antibiotics
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A 10-year-old boy struggles with inattention at school, often daydreaming and losing focus. His grades are declining, and he forgets homework. Parents report similar issues at home. What's the most appropriate initial step?

A. Academic tutoring
B. Trial of stimulant medication
C. Comprehensive ADHD assessment
D. Referral to a child psychologist for behavioural therapy
E. Parenting skills training
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A 5-year-old boy is brought to the clinic by his parents due to a 3-day history of fever, irritability, and refusal to eat. On examination, he has a temperature of 39°C, erythematous oropharynx, and tender cervical lymphadenopathy. There are also vesicular lesions on his hands and feet. What is the most likely diagnosis?

A. Varicella (chickenpox)
B. Scarlet fever
C. Hand, foot, and mouth disease
D. Kawasaki disease
E. Herpangina
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An ultrasound showing target sign which is a characteristic finding for intussusception on ultrasound, this ultrasound is for a 3 year old boy with intestinal intussusception.
Image by Frank Gaillard CC BY-SA 3.0 · Source

A 3-year-old boy presents with sudden onset, intermittent, severe abdominal pain, vomiting, and lethargy. His vital signs are stable. On examination, he is pale. An abdominal ultrasound is performed, shown in the image. Based on the clinical presentation and imaging findings, what is the most appropriate next step in management?

A. Admission for intravenous fluids and observation
B. Urgent laparotomy for surgical reduction
C. Administer intravenous broad-spectrum antibiotics
D. Pneumatic reduction under fluoroscopic guidance
E. Obtain a CT scan of the abdomen and pelvis
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