Pseudotumoral aspect of posttraumatic digital synovitis.
A case of posttraumatic subacute synovitis with pseudotumor of the digit with bone lesions on plain film is reported. Arteriography showed a pattern of hypervascularity  that did not appear malignant and evoked a benign tumor of the synovial. Biopsy helped establish diagnosis of common subacute synovitis. Swelling disappeared spontaneously during subsequent months. Diagnosis of villonodular synovitis is difficllt when proliferation of histiocytes is present.
D000792:Angiography; D002648:Child; D003937:Diagnosis, Differential; D005383:Finger Injuries / Q000150:complications*; D005384:Finger Joint; D005385:Fingers / Q000098:blood supply / Q000000981:diagnostic imaging; D050723:Fractures, Bone / Q000150:complications*; D006801:Humans; D008662:Metacarpophalangeal Joint; D013584:Sarcoma, Synovial / Q000175:diagnosis*; D012983:Soft Tissue Neoplasms / Q000175:diagnosis*; D013585:Synovitis / Q000175:diagnosis*