title: Malignant transformation of extra-articular synovial chondromatosis: report of a case.
abstract: A 47-year-old woman had a chondrosarcoma arise in extra-articular synovial chondromatosis near the ankle. A review of the literature suggests that this lesion is rare and that proper interpretation of histopathologic preparation of cartilage lesions can be difficult.
mesh_terms: D001859:Bone Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D002358:Cartilage, Articular / Q000473:pathology; D002812:Chondroma / Q000000981:diagnostic imaging* / Q000473:pathology; D002813:Chondrosarcoma / Q000473:pathology; D005260:Female; D006801:Humans; D008875:Middle Aged; D011859:Radiography