10.22376/ijpbs.2019.10.1.p1-12 Volume 6 Issue 4 2015 (October - December) The Budd Chiari syndrome is a heterogeneous group of disorders characterized by hepatic venous outflow obstruction at the level of the hepatic venules, the large hepatic veins, the inferior vena cava, or the right atrium lessThan sup greaterThan 1 lessThan /sup greaterThan . Hepatic veno-occlusive disease refers to obstruction of hepatic venous outflow at the level of the central or sub lobular hepatic veins, or both We present a 21 year old female with no previous history who presented with sudden onset of abdominal pain and massive ascites. Ultrasound abdomen & Doppler study and finally an IVC venogram was done which showed occlusion in the hepatic veins & Inferior vena cava and was hence diagnosed to have Sub-acute Budd Chiari syndrome DR. SAKTHI SELVA KUMAR, DR. VINOTH KUMAR, DR. BALAKISHNAN AND DR.N.N.ANAND Budd Chiari syndrome, ascites, Hepatic veno-occlusive disease. 419-425