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A 6-month-old infant presents with wheezing and retractions. Chest x-ray shows hyperinflation. Most likely diagnosis is:
- A. Pneumonia
- B. Bronchiolitis
- C. Cystic fibrosis
- D. Asthma
Correct Answer: B
Rationale: Bronchiolitis features wheezing and hyperinflation, per AAP. A, C-E differ.
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A newborn appears with abdominal distension and bilious vomiting. Abdominal x-ray reveals a double bubble sign. Most likely diagnosis is:
- A. Pyloric stenosis
- B. Duodenal atresia
- C. Hirschsprung disease
- D. Meconium ileus
Correct Answer: B
Rationale: Duodenal atresia shows a double bubble sign with bilious vomiting, per AAP. A, C-E have different presentations.
Most common endocrine abnormality in patients with cystic fibrosis is:
- A. Hypothyroidism
- B. Diabetes mellitus
- C. Adrenal insufficiency
- D. Hyperthyroidism
Correct Answer: B
Rationale: Cystic fibrosis-related diabetes is the most common endocrine issue, from pancreatic damage, per CFF. A, C-E are less frequent.
A 4-year-old girl presents with fever and conjunctivitis. Exam shows a rash and swollen hands. Most likely diagnosis is:
- A. Measles
- B. Kawasaki disease
- C. Scarlet fever
- D. Rubella
Correct Answer: B
Rationale: Kawasaki disease includes fever, conjunctivitis, rash, and swollen hands, per AHA. A, C-E differ.
A one-year-old girl with dysentery is discharged. The most important information for the mother is
- A. Place child on NPO for 8 hours if diarrhea occurs
- B. Don’t wait long before bringing child to hospital
- C. Observe good hygiene to reduce faeco-oral spread
- D. Start anti-diarrhea meds before hospital
Correct Answer: C
Rationale: Hygiene C prevents reinfection, critical in dysentery, per document 0.
A child with a history of cystic fibrosis suddenly develops right-sided chest pain and shortness of breath. Physical examination reveals decreased breath sounds on the right side and mediastinal shift to the left side. Most likely diagnosis is:
- A. Pneumonia
- B. Asthma exacerbation
- C. Foreign body aspiration
- D. Pneumothorax
Correct Answer: D
Rationale: Pneumothorax matches unilateral findings and mediastinal shift in cystic fibrosis, per CFF. A-C, E don’t fit.