Progressive Abdominal Distension in Pediatrics — Case | Pediatric Gastroenterology | SMLE Q#16824
SMLE Question #16824
Pediatrics
Pediatric Gastroenterology
Objective: OBJ-289
Last updated: February 2026
A 1-month-old male infant has persistent constipation since birth with progressive abdominal distension and intermittent bilious vomiting. His parents report passage of meconium more than 48 hours after birth and frequent need for rectal stimulation. Abdominal examination shows distension and tympany. Digital rectal examination finds an empty rectum followed by passage of a large amount of stool after withdrawal. Which diagnostic test has the highest diagnostic value to confirm the suspected diagnosis?
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