A 12-year-old boy presents with hematemesis, melena and mild splenomegaly. There is no obvious jaundice or ascites. The most likely diagnosis is:

Most likely diagnosis is Extrahepatic Poal Vein Obstruction Differences b/w EHPVO and NCPF EHPVO - Extra hepatic poal venous obstruction- usually seen in 1st to 2nd decade; splenomegaly is less common & if its present, It is only mild/moderate NCPF - Non-Cirrhotic poal fibrosis - in 2nd -4th decade; Splenomegaly is M/C & If present, it is moderate to severe ;hematemesis present , no obvious jaundice & ascites .