system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 5-day-old term male neonate presents with delayed passage of meconium, abdominal distension and bilious vomiting. Barium enema and intestinal biopsy findings are shown below. What is the diagnosis?
assistant
The correct answer is  a. Congenital aganglionic megacolonBa enema shows narrow distal segment with dilated proximal segment of intestineIntestinal biopsy shows hypertrophied nerve bundles between muscular layer & submucosa