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A 3-month-old infant presents with poor feeding and hypotonia. MRI shows periventricular leukomalacia. Most likely diagnosis is:
- A. Hypoxic-ischemic encephalopathy
- B. Congenital infection
- C. Metabolic disorder
- D. Trauma
Correct Answer: A
Rationale: HIE causes leukomalacia, per AAP. B-E differ.
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A 5-year-old girl presents with abdominal pain and vomiting. CT shows a twisted mesentery. Most likely diagnosis is:
- A. Appendicitis
- B. Intussusception
- C. Malrotation with volvulus
- D. Meckel diverticulum
Correct Answer: C
Rationale: Malrotation with volvulus features pain, vomiting, and twisted mesentery, per AAP. A, B, D, E differ in CT.
A child with diabetes should be taught to recognize
- A. Shakiness
- B. Sweating
- C. Weakness
- D. All of the above
Correct Answer: D
Rationale: All D are hypoglycemia signs, per document p60, 9.
Most common cause of Cushing syndrome in children is:
- A. Adrenal tumor
- B. Pituitary adenoma
- C. Exogenous steroids
- D. Ectopic ACTH syndrome
Correct Answer: C
Rationale: Exogenous steroids are the most common cause of Cushing syndrome in children, per AAP (doc p150, Q590).
A 19-year-old pregnant mother likes all-night dance parties. She took methylenedioxymetamphetamine (MDMA 'X', Ecstasy) routinely before and during pregnancy. The most likely fetal defect is:
- A. Pulmonary
- B. Gastrointestinal
- C. CNS
- D. Cardiac
Correct Answer: D
Rationale: MDMA use in pregnancy is linked to cardiac defects , like septal defects, per studies (Teratology). A-C, E are less specific.
A 3-month-old infant presents with poor feeding and lethargy. Labs show hypoglycemia and ketosis. Most likely diagnosis is:
- A. Sepsis
- B. Glycogen storage disease
- C. Galactosemia
- D. Fatty acid oxidation disorder
Correct Answer: D
Rationale: FAOD causes hypoglycemia and ketosis, per NORD. A-C, E differ.