Intermittent Irritability in Pediatrics — Case | General Pediatrics | SMLE Q#1210
SMLE Question #1210
Pediatrics
General Pediatrics
Last updated: February 2026
A 3-day-old full-term male newborn is brought to the emergency department for poor feeding and increasing lethargy with intermittent irritability. His parents report an unusually sweet odor to his urine. There is no history of jaundice, vomiting after milk feeds, or seizures. Family history is unremarkable, and the parents are not related. On examination, he is listless but arousable. What is the most likely diagnosis?
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