vascular malformation fibro-adipose vascular anomaly A rare vascular malformation characterized by fibro-adipose and venous tissue with diffuse muscle infiltration and extension along fascial planes, most often affecting the calf and forearm. Major clinical features include severe and persistent pain, phlebectasia, contractures, joint deformity as well as muscle atrophy. The skin is usually unremarkable. Orphanet:699683 MONDO:0979335