Current concepts in the management of non-cirrhotic non-malignant portal vein thrombosis

Table 2 Recommended standardized nomenclature for portal vein thrombosis description

Feature	Definition
Time course
Recent	Portal vein thrombus presumed to be present for < 6 months
Chronic	Portal vein thrombus present or persistent for > 6 months
Percentage occlusion of main portal vein
Completely occlusive	No persistent lumen
Partially occlusive	Clot obstructing > 50% of original vessel lumen
Minimally occlusive	Clot obstructing < 50% of original vessel lumen
Cavernous transformation	Gross porto-portal collaterals without original portal vein seen
Response to treatment or interval change
Progressive	Thrombus increases in size or progresses to more complete occlusion
Stable	No appreciable change in size or occlusion
Regressive	Thrombus decreases in size or degree of occlusion

Recommended standardized nomenclature for portal vein thrombosis description[26].