Budd-Chiari syndrome in myeloproliferative neoplasms: A review of literature

Table 1 Classification of Budd-Chiari syndrome

Ref.	Type	Site of obstruction
Chaubal et al[46]	I	Obstruction of IVC with or without secondary hepatic vein occlusion
	II	Obstruction of major hepatic veins
	III	Obstruction of small centrilobular veins (considered by some as veno-occlusive disease)
Patil et al[48]	I	Lesions of the IVC
	IIa	Short segment (< 4 cm) lesion of the hepatic vein
	IIb	Diffuse lesion of the hepatic vein
	III	Mixed type with lesions of IVC and the hepatic vein
Bansal et al[47]	I	Hepatic vein obstruction or thrombosis without IVC obstruction or compression
	II	Hepatic vein obstruction or thrombosis with IVC obstruction or thrombosis
	III	Isolated hepatic venous webs
	IV	Isolated IVC webs

IVC: Inferior vena cava.