Two weeks later, the patient described in Question 7 complains of headache, poor nasal airflow... The most likely diagnosis is

Correct Answer: A

Rationale: The change to mucopurulent discharge, fever, and poor nasal airflow suggests sinusitis, a common complication of allergic rhinitis.

Correct Answer: D

Rationale: Hepatobiliary scintigraphy assesses bile flow and is crucial for diagnosing biliary atresia, the most common cause of neonatal cholestasis.

Correct Answer: A

Rationale: Tumor lysis syndrome releases large amounts of potassium due to rapid cell breakdown, leading to hyperkalemia.

Correct Answer: A

Rationale: Neonates of diabetic mothers often experience hypoglycemia due to fetal hyperinsulinemia in response to maternal hyperglycemia. After birth, insulin levels remain high while maternal glucose supply is cut off, leading to hypoglycemia.

Correct Answer: C

Rationale: Atelectasis results in dull percussion, not normal findings, due to lung collapse and volume loss.