Perioral Cyanosis in Pediatrics — Case | Pediatric Gastroenterology | SMLE Q#11542
SMLE Question #11542
Pediatrics
Pediatric Gastroenterology
Objective: OBJ-289
Last updated: February 2026
A 6-month-old boy has a sudden episode of apnea with perioral cyanosis. For 3 months, he has had recurrent non-bilious vomiting after feeds, frequent coughing, multiple chest infections treated with antibiotics, and poor weight gain despite breastfeeding and formula supplementation. During examination, he has intermittent dystonic neck posturing with back arching while crying. Lung examination reveals scattered bilateral crackles. Which mechanism most likely contributes to this infant’s condition?
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