Portal vein thrombosis in cirrhotic patients - it is always the small pieces that make the big picture

Table 1 Portal vein thrombosis - Baveno VI - classification[8]

Site of PVT	Type 1: Only trunk
	Type 2: Only branch: 2a - one branch, 2b - both branches
	Type 3: Trunk and branches
Presentation	R: Recent
	Ch: Chronic
Type of underlying liver disease	C: Cirrhotic
	N: Non-cirrhotic liver disease
	H: HCC and other local malignancies
	L: Post-liver transplant
	A: Absence of underlying liver disease
Degree of portal venous system occlusion	I: Incomplete: Flow visible in PV lumen through imaging
	T: Total: No flow visible in PV lumen on imaging
Extent of PV system occlusion	Splenic vein (S)
	Mesenteric vein (M)
	Both (SM)

PVT: Portal vein thrombosis; HCC: Hepatocellular carcinoma; PV: Portal vein.

Table 2 Anatomico-functional classification of portal vein thrombosis in cirrhosis[9]

Site of PVT	Type 1: Only trunk
	Type 2: Only branch: 2a - one branch, 2b - both branches
	Type 3: Trunk and branches
Duration and presentation	R: Recent (first time detected in previously patent PV)
	Asymptomatic: (As)
	Symptomatic: (S)- acute PVT features (with or without ABI)
	Ch: Chronic (previously diagnosed PVT on follow-up, portal cavernoma and clinical features of PHT)
	Asymptomatic
	Symptomatic: Features of portal hypertension
Type of underlying liver disease	Cirrhotic
	Non-cirrhotic liver disease
	HCC and other local malignancies
	Post-liver transplant
	Local malignancies
	Associated conditions
Degree of portal venous system occlusion	O: Occlusive: No flow visible in PV lumen on imaging/Doppler study
	NO: Nonocclusive: Flow visible in PV lumen through imaging/Doppler study
Extent of PV system occlusion	Splenic vein (S)
	Mesenteric vein (M)
	Both (SM)

PVT: Portal vein thrombosis; ABI: Acute bowel infarction; PHT: Portal hypertension; HCC: Hepatocellular carcinoma; PV: Portal vein.