The authors have studied the findings of radionuclear scanning, inferior vena cavography and ultrasonographyin 2 cases of Budd-chiari Sundrome experienced diffuse inhomogeneous uptake throughout enlarged liver without colddefects. Slightly increased activity in the central portion of liver in case I and markedly increased activity inthe caudate lobe in case II were observed. In inferior vena cavography, the dilated hepatic veins formingintrahepatic collaterals were seen in enlarged caudate lobe. Marked stenosis of I.V.C. at the level of confluenceto right atrium, intraluminal thrombosis of I.V.C., partial obstruction of hepatic veins by thrombi at theconfluent portion and systemic collaterals were noted in case I. In case II, abrupt conical obstruction of I.V.C.at the orgin of hepatic segment, which is consistent with membrane or web. was seen. Prominent systemiccollaterals were developed through the serpinginous margedly dilated azygos and hemiazygos veins, and splenorenalshunt. In ultrasonography, diffuse narrowing and obstruction of hepatic veins at eh confluent level by echogenicnodules were seen in 2 cases. Prominent intrahepatic venous collaterals were observed in case II.