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

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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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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 1-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 parents report the bulge is more prominent with crying but is easily reducible. The child is otherwise well, feeding normally, and has no history of pain, vomiting, or constipation. Physical examination reveals normal vital signs and a soft, non-tender abdomen. Considering the clinical presentation and the finding shown, what is the most appropriate advice to give the parents regarding initial management?

A. Recommend an abdominal ultrasound scan to rule out incarceration or other complications.
B. Instruct the parents on how to apply a binder or tape to the area to help it close faster.
C. Provide reassurance that this is a common condition in infants and toddlers that often resolves spontaneously, advising observation.
D. Explain that surgical repair is typically required and arrange a referral to a paediatric surgical service.
E. Advise investigation for potential underlying genetic syndromes or metabolic disorders.
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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 presents with projectile vomiting after feeds. He is otherwise well-appearing, with normal vital signs and no abdominal distension. An ultrasound was performed, and an image is shown. What is the MOST appropriate next step in management?

A. Barium swallow study
B. Upper endoscopy with biopsy
C. Surgical consultation for pyloromyotomy
D. Initiate erythromycin therapy
E. Trial of thickened feeds
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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, and his weight has remained stable since birth. On examination, an olive-shaped mass is palpated in the epigastric region when the infant is not actively vomiting. An upper GI series is performed, and the image is shown. What is the most appropriate next step in the management of this patient?

A. Initiate a trial of thickened feeds
B. Surgical pyloromyotomy
C. Administer intravenous ondansetron and observe
D. Start erythromycin to stimulate gastric emptying
E. Perform an upper endoscopy with biopsy
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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 1-year-old presents with the abdominal exam shown. It is easily reducible. What is the most appropriate management?

A. Referral for physiotherapy
B. Trial of abdominal binder
C. Reassurance and observation
D. Order abdominal ultrasound
E. Surgical referral now
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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 presents with projectile vomiting after feeds. An ultrasound is performed (shown). What is the MOST appropriate next step in management?

A. Trial of thickened feeds
B. Upper endoscopy with biopsy
C. Reassurance and close follow-up
D. Start erythromycin
E. Surgical consultation for pyloromyotomy
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A 6-month-old infant is brought to the general practitioner by his parents, who are concerned about a persistent, itchy rash. The rash initially appeared on his cheeks and scalp a few weeks ago and has now spread to his trunk and extensor surfaces of his arms and legs. The parents report that the infant is constantly scratching, which disrupts his sleep. He has no known allergies, and there is no family history of asthma or allergic rhinitis. On examination, the infant is alert and active. There are erythematous, papular lesions with areas of weeping and crusting on his cheeks, scalp, trunk, and extensor surfaces. The skin is dry and flaky in other areas. Which of the following is the MOST appropriate initial management strategy for this infant's condition?

A. Systemic corticosteroids
B. Referral to a dermatologist for allergy testing
C. Oral antihistamines and topical antibiotics
D. Emollients and topical corticosteroids
E. Elimination diet for the mother (if breastfeeding)
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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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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 4-month-old presents for a well-child visit. The infant is thriving, feeding well, and has no vomiting or respiratory distress. Examination reveals the finding shown. The mass is soft and easily reducible. What is the most appropriate management?

A. Genetic testing for connective tissue disorders
B. Initiation of high-fiber diet
C. Application of an abdominal binder
D. Immediate surgical referral
E. Reassurance and observation
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Hypertrophic pyloric stenosis
Image by Adityagupta95 CC0 1.0 · Source

A 3-week-old male presents with projectile vomiting after feeds. An upper GI series is performed (image shown). What is the MOST appropriate next step in management?

A. Barium swallow study
B. Surgical pyloromyotomy
C. Medical management with erythromycin
D. Trial of thickened feeds
E. Upper endoscopy with biopsy
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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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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 increasing frequency of non-bilious vomiting after feeds for the past week. He is otherwise well, afebrile, and has wet nappies. On examination, he is alert and interactive. Abdominal examination is unremarkable. Vitals are stable. You order an ultrasound, which is shown. Based on the clinical presentation and the provided image, what is the most appropriate immediate next step in management?

A. Obtain an upper gastrointestinal barium study.
B. Discharge home with advice on feeding techniques and follow-up.
C. Proceed directly to surgical pyloromyotomy.
D. Initiate intravenous fluid resuscitation and correct electrolyte abnormalities.
E. Prescribe a proton pump inhibitor and trial smaller, more frequent feeds.
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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 9-month-old presents with the abdominal finding shown. It is soft and reducible. Parents are concerned. What counseling is most appropriate?

A. Reassurance and observation, as most resolve spontaneously by age 5
B. Application of an abdominal binder to prevent further enlargement
C. Immediate surgical referral due to risk of incarceration
D. Initiation of physiotherapy to strengthen abdominal muscles
E. Dietary changes to reduce intra-abdominal pressure
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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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Pyloric stenosis as seen on ultrasound in a 6 week old
Image by Dr Laughlin Dawes CC BY-SA 4.0 · Source

A 4-week-old male presents with persistent non-bilious vomiting after feeding. He is mildly dehydrated, but otherwise active. An ultrasound is performed, as shown. What is the MOST likely acid-base disturbance?

A. Metabolic acidosis
B. Normal acid-base balance
C. Respiratory acidosis
D. Respiratory alkalosis
E. Metabolic alkalosis
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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 presents with persistent non-bilious vomiting after feeding. He appears hungry and has lost weight since birth. Examination reveals visible peristaltic waves across the abdomen. An abdominal ultrasound is performed, as shown. What is the most likely acid-base disturbance seen in this patient?

A. Metabolic alkalosis
B. Respiratory acidosis
C. Normal acid-base balance
D. Respiratory alkalosis
E. Metabolic acidosis
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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 6-month-old male infant is brought to the emergency department by his parents. They report that they have noticed a bulge on his abdomen that seems to get larger when he cries. The infant is otherwise healthy, feeding well, and has normal bowel movements. On examination, the infant is afebrile, and his vital signs are within normal limits. The abdomen is soft and non-tender. Palpation reveals a soft, reducible mass at the umbilicus, as shown in the image. What is the MOST appropriate next step in the management of this patient?

A. Urgent ultrasound to rule out incarceration
B. Application of an abdominal binder
C. Reassurance and observation
D. Immediate surgical referral for elective repair
E. Initiation of a high-fiber diet to prevent constipation
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Hypertrophic pyloric stenosis
Image by Adityagupta95 CC0 1.0 · Source

A 4-week-old male presents with projectile vomiting after feeding. He is irritable and appears mildly dehydrated. An abdominal exam reveals a palpable, olive-shaped mass in the epigastrium. An upper GI contrast study is performed, and relevant images are shown. What is the MOST appropriate initial step in managing this patient's electrolyte imbalance?

A. Initiate feeding with a hypoallergenic formula
B. Administer intravenous normal saline bolus
C. Administer intravenous sodium bicarbonate
D. Administer oral rehydration solution
E. Administer intravenous potassium chloride
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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 abdominal examination. What is the most appropriate next step in management?

A. Obtain a stool sample to rule out infection
B. Reassurance and observation
C. Order an abdominal ultrasound to assess for bowel obstruction
D. Initiate treatment for gastroesophageal reflux
E. Referral to a pediatric surgeon for elective repair
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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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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 infant presents to the emergency department with a 3-day history of non-bilious, projectile vomiting after each feed. He is otherwise well-appearing and afebrile. His mother reports that he is feeding well but seems increasingly hungry after vomiting. On examination, the infant is alert and active, with slightly dry mucous membranes. Abdominal examination is unremarkable, with no palpable masses. An ultrasound of the abdomen is performed, the image of which is shown. What is the most appropriate next step in the management of this patient?

A. Surgical consultation for pyloromyotomy
B. Administer intravenous ondansetron and observe
C. Upper gastrointestinal endoscopy with biopsy
D. Discharge home with instructions for frequent small-volume feeds
E. Initiate a trial of thickened feeds
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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 14-month-old child is presented to the general practitioner by their parents, who are concerned about a noticeable protrusion around the navel. They report this bulge is more prominent when the child cries or strains but easily disappears when the child is relaxed or sleeping. There are no reports of pain, discomfort, changes in bowel habits, or feeding difficulties. The child is meeting all developmental milestones and appears well. On examination, vital signs are stable and within age-appropriate ranges. The abdomen is soft and non-tender, with no distension. The finding illustrated in the accompanying image is observed. Based on this clinical presentation and examination, what is the most appropriate initial management plan?

A. Refer the child urgently to a paediatric surgeon for immediate assessment and potential repair.
B. Recommend applying a specific binder or tape over the area to facilitate closure.
C. Provide reassurance to the parents regarding the benign nature of the finding and advise observation, explaining the high likelihood of spontaneous resolution by school age.
D. Advise the parents to present immediately to the nearest emergency department if the bulge is visible.
E. Order an abdominal ultrasound to assess the contents and size of the defect.
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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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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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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 1-year-old child presents to the GP with parental concern about a bulge on the abdomen, as shown in the image. The child is asymptomatic, feeding well, and has normal bowel movements. Examination reveals a soft, reducible finding at the umbilicus; the abdomen is non-tender with normal bowel sounds. Based on this presentation and the image, what is the most appropriate initial management?

A. Arrange an urgent abdominal ultrasound.
B. Recommend applying a binder or tape over the area.
C. Prescribe analgesia for potential pain.
D. Reassure parents about likely spontaneous resolution and schedule routine follow-up.
E. Refer urgently to paediatric surgery for repair.
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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 and the findings demonstrated in the image, what is the most appropriate immediate next step in the management of this infant?

A. Administer intravenous ondansetron and observe for improvement in vomiting.
B. Discharge home with instructions for smaller, more frequent feeds and review by the general practitioner in 24 hours.
C. Insert a nasogastric tube for continuous drainage and commence total parenteral nutrition.
D. Obtain an urgent upper gastrointestinal contrast study to confirm the diagnosis and assess for malrotation.
E. Initiate intravenous fluid resuscitation with 0.9% sodium chloride and potassium chloride supplementation, and arrange urgent surgical consultation.
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Hypertrophic pyloric stenosis
Image by Adityagupta95 CC0 1.0 · Source

A 6-week-old male infant presents to the emergency department with a 5-day history of progressively worsening non-bilious vomiting, which has become projectile over the past 48 hours. He is exclusively formula-fed and his parents report decreased wet nappies and increased irritability. On examination, he is alert but appears slightly lethargic. His weight is below his birth weight. Capillary refill time is 3 seconds. Vitals are: HR 150 bpm, RR 40 bpm, T 37.2°C, BP 85/50 mmHg. Abdominal examination is soft, non-distended, and no masses are definitely palpable. Initial blood gas shows pH 7.52, pCO2 40 mmHg, HCO3 32 mmol/L, Na+ 130 mmol/L, K+ 3.0 mmol/L, Cl- 85 mmol/L. Urea and creatinine are mildly elevated. An imaging study was performed, shown above. Considering the clinical presentation and the findings on the imaging study, which of the following is the most critical immediate management step?

A. Initiate intravenous fluid resuscitation with 0.9% sodium chloride and potassium supplementation.
B. Insert a nasogastric tube for gastric decompression.
C. Administer intravenous ondansetron to control vomiting.
D. Arrange for urgent surgical consultation for pyloromyotomy.
E. Obtain a paediatric surgical ultrasound of the abdomen.
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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 findings, and the abnormality demonstrated in the provided image, which of the following best explains the mechanism leading to the observed electrolyte and acid-base derangements?

A. Loss of gastric acid (HCl) through vomiting, leading to compensatory renal hydrogen ion excretion and potassium wasting.
B. Increased aldosterone secretion due to dehydration, causing sodium retention and potassium excretion.
C. Excessive sodium and water loss in stool due to malabsorption.
D. Shift of potassium into intracellular space due to metabolic alkalosis.
E. Impaired renal bicarbonate excretion due to decreased glomerular filtration rate from dehydration.
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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 after each feed for the past week. He is alert but appears dehydrated. An ultrasound is performed, as shown. What electrolyte abnormality is MOST likely present?

A. Hyperchloremic metabolic acidosis
B. Hyponatremia
C. Normal electrolytes
D. Hypochloremic metabolic alkalosis
E. Hyperkalemia
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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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Hypertrophic pyloric stenosis
Image by Adityagupta95 CC0 1.0 · Source

A 3-week-old male presents with projectile vomiting after each feed. He appears hungry and eagerly feeds, but vomits shortly after. An abdominal X-ray is ordered, the result of which is shown. What is the most appropriate next step in management?

A. Surgical pyloromyotomy
B. Upper endoscopy with biopsy
C. Start erythromycin
D. Administer ondansetron
E. Trial of thickened feeds
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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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Hypertrophic pyloric stenosis
Image by Adityagupta95 CC0 1.0 · Source

A 5-week-old male presents with projectile vomiting after feeds. He is irritable and appears dehydrated. An upper GI contrast study is performed, with relevant images attached. What is the MOST likely underlying cause?

A. Malrotation with volvulus
B. Duodenal atresia
C. Gastroesophageal reflux
D. Hypertrophy of the pyloric sphincter
E. Esophageal stricture
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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 9-month-old presents with a noticeable abdominal protrusion, more prominent when crying. The child is feeding well and has regular bowel movements. Examination reveals a soft, easily reducible bulge at the umbilicus, as shown. Parents are concerned about potential complications. What is the MOST appropriate parental advice?

A. Advise immediate surgical repair to prevent future complications like bowel strangulation.
B. Recommend applying a belly band to reduce the protrusion and promote closure.
C. Reassurance that most cases resolve spontaneously by age 5; surgical intervention is rarely needed unless incarcerated.
D. Suggest a high-fiber diet to prevent constipation and reduce intra-abdominal pressure.
E. Prescribe topical corticosteroids to reduce inflammation and promote skin closure.
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Hypertrophic pyloric stenosis
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A 5-week-old male infant presents with a 10-day history of non-bilious, forceful vomiting after every feed. His parents report decreased wet nappies and lethargy. On examination, he is pale, weighs 3.2 kg (birth weight 3.5 kg), has sunken eyes, and poor skin turgor. Vital signs: HR 170, RR 45, Temp 37.0, BP 80/50. Initial bloods show Na 132, K 3.1, Cl 88, HCO3 30. An imaging study is performed, shown in the image. Considering the clinical presentation and the findings demonstrated in the imaging study, what is the most appropriate immediate management priority for this infant?

A. Administer intravenous ondansetron to control vomiting.
B. Arrange urgent surgical consultation for definitive operative management.
C. Initiate intravenous fluid resuscitation with 0.9% sodium chloride and potassium supplementation.
D. Obtain a repeat imaging study using abdominal ultrasound.
E. Insert a nasogastric tube for gastric decompression and feeding.
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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 6-month-old presents for a well-child check. The image shows the abdominal exam. Parents report it enlarges when crying. What is the most appropriate next step?

A. Immediate surgical exploration
B. Reassurance and observation
C. Initiation of diuretic therapy
D. Application of an abdominal binder
E. Surgical referral for elective repair
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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, you observe the finding in the image. The mass is soft and easily reducible. What is the MOST appropriate next step in management?

A. Initiation of high-fiber diet
B. Application of an abdominal binder
C. Immediate surgical referral
D. Genetic testing for connective tissue disorders
E. Reassurance and observation
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Umbilical hernia
Image by Ibrahim Husain Meraj CC BY-SA 4.0 · Source

A 9-month-old presents with a noticeable abdominal protrusion, accentuated during crying. The infant is feeding well and has regular bowel movements. Examination reveals a soft, easily reducible bulge at the umbilicus, as shown. Parents are concerned about potential complications. What is the MOST appropriate parental advice?

A. Prescribe topical corticosteroids to reduce inflammation and promote skin retraction.
B. Recommend applying a belly band to reduce the hernia and promote closure.
C. Advise immediate surgical repair to prevent future complications like bowel strangulation.
D. Suggest a high-fiber diet to prevent constipation and reduce intra-abdominal pressure.
E. Reassurance that most cases resolve spontaneously by age 5; surgical intervention is rarely needed unless incarcerated.
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Hypertrophic pyloric stenosis
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A 4-week-old male presents with persistent projectile vomiting after feeding. He is otherwise well-appearing. An upper GI series is performed, with relevant images attached. What acid-base disturbance is MOST likely present?

A. Respiratory acidosis
B. Normal acid-base balance
C. Hypochloremic metabolic alkalosis
D. Hyperchloremic metabolic acidosis
E. Respiratory alkalosis
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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. They report that he has been experiencing projectile vomiting after every feed for the past week. The vomiting is non-bilious. He appears dehydrated, with sunken fontanelles and decreased skin turgor. His weight has decreased since his last check-up. An abdominal X-ray is ordered, the results of which are shown. What is the most appropriate next step in the management of this patient?

A. Surgical consultation for pyloromyotomy
B. Discharge home with oral rehydration solution
C. Perform an upper endoscopy
D. Start feeds with thickened formula
E. Administer intravenous 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 6-week-old infant presents with a 1-week history of increasing non-bilious projectile vomiting after feeds. He is otherwise well, afebrile, and has wet nappies. Examination is unremarkable. An ultrasound is performed, shown in the image. Considering the clinical presentation and the findings in the provided image, what is the most appropriate definitive surgical intervention for this condition?

A. Antrectomy
B. Laparoscopic Nissen fundoplication
C. Ramstedt pyloromyotomy
D. Gastrostomy tube insertion
E. Pyloric dilatation
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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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Hypertrophic pyloric stenosis
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A 4-week-old male presents with persistent projectile vomiting after each feed. He appears hungry and eagerly feeds, but vomits shortly after. An abdominal X-ray is ordered, the result of which is shown. What is the most appropriate next step in management?

A. Start a trial of hypoallergenic formula
B. Initiate intravenous antibiotics
C. Surgical pyloromyotomy
D. Administer antiemetics and observe
E. Upper endoscopy with biopsy
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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 2-year-old boy presents to the emergency department with a 1-day history of colicky abdominal pain. His parents report that the pain occurs in episodes, during which he cries intensely and pulls his legs up to his chest. Between episodes, he appears relatively comfortable. He has had one episode of vomiting. His parents also noticed a small amount of blood in his stool this morning. On examination, the child is alert but irritable. His abdomen is soft, but a palpable mass is noted in the right upper quadrant. An ultrasound is performed, with a representative image shown. What is the MOST appropriate initial management strategy?

A. Air enema under fluoroscopic guidance
B. Surgical exploration
C. Appendectomy
D. Observation with intravenous fluids
E. Barium enema
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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 shown in the image is noted. Based on this clinical presentation and examination finding, what is the most appropriate initial management plan?

A. Provide reassurance to the parents that spontaneous closure is likely and no immediate intervention is required.
B. Arrange an abdominal ultrasound to assess the size of the fascial defect and contents of the sac.
C. Schedule elective surgical repair within the next 6 months to prevent future complications.
D. Recommend applying a firm abdominal binder or tape over the area to facilitate closure.
E. Refer the child for urgent surgical consultation due to the risk of incarceration or strangulation.
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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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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 presents with projectile vomiting after feeds. He is otherwise well-appearing, with normal vital signs. An abdominal ultrasound is performed (image attached). What is the MOST appropriate next step in management?

A. Initiate a proton pump inhibitor
B. Surgical consultation for pyloromyotomy
C. Reassurance and close follow-up
D. Upper endoscopy with biopsy
E. Trial of thickened feeds
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