Benign condition with purple-coloured patches, plaques or nodules, usually found bilaterally on the extensor surfaces of the lower extremities and associated with chronic venous insufficiency and arteriovenous malformations. A reactive angiodysplasia of preexisting cutaneous blood vessels that resembles malignant conditions like Kaposi''s sarcoma and requires histopathological examination for its diagnosis and differentiation. [from
SNOMEDCT_US]