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 12-year-old boy presents with hematemesis, malaena and mild splenomegaly. There is no obvious jaundice or ascites. The most likely diagnosis is:
assistant
The correct answer is  The given history is suggestive of poal hypeension Extrahepatic poal vein obstruction is an impoant cause of poal hypeension in childhood.