A child is brought by mother with HO massive hemetemesis with HO drug intake previously with NSAIDS and on Rx. Associated with moderate splenomegaly diagnosis is

Causes of portal hypertension Pre sinusoidal Extrahepatic (most commoon) :portal vein/splenic vein thrombosis,splenic AV fistula,massive splenomegaly. Intrahepatic: sarcoidosis, schistosomiasis, congenital hepatic fibrosis, myeloproliferative disorders, nodular degenerative hyperplasia, idiopathic portal fibrosis. Sinusoidal Cirrhosis due to any cause. Post sinusoidal Budd chiari syndrome,right heart failure,constrictive pericarditis,web in inferior venacava.