Cancer	≥ 2 idiopathic deep vein thromboses distal deep vein thrombosis (below knee)
	Important causing risk factors :	Surgical intervention Severe comorbidity Immobilized leg (cast, splint, stroke)
	Less important causing risk factors :	Estrogens (oral contraceptiva, estrogen substitution)
	Low risk thrombophilia :	Heterozygous forms of : Factor-V Leiden Mutation of prothrombin gene
	High risk thrombophilia :	Presence of : Deficiency of protein C or protein S Anti-phospholipid antibodies Homozygous forms of : Factor-V Leiden Mutation of prothrombin gene Heterozygous forms of : Factor-V Leiden + Mutation of prothrombin gene
	Recommended duration of oral anticoagulation :	Label