title: Synovial chondromatosis of the left temporomandibular joint superficially resembling chondrosarcoma: a case report.
abstract: A 25 year-old woman was referred to the clinic complaining of pain in the left temporomandibular joint (TMJ) and trismus. According to the x-ray images, a solitary mass was observed in the anterior pouch of the lower joint cavity. The mass was removed by means of a synovectomy and a diskectomy. Upon light microscopic examination, the tissue removed showed high cellular activity. As a differential diagnosis, we had to consider the possibility of chondrosarcoma based on the histopathological features; however, since no invasive nor metastatic finding was recognized, we made a diagnosis of synovial chondromatosis despite its rare existence. Although there has been no sign of recurrence at present, we plan to carefully follow up with the patient.
authors.affiliation: Div. of Maxillofacial and Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, 5-45, Yushima 1-chome, Bunkyo-ku, Tokyo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Shibuya
authors.forename: K
authors.initials: K
authors.lastname: Kino
authors.forename: N
authors.initials: N
authors.lastname: Okada
authors.forename: T
authors.initials: T
authors.lastname: Amagasa
mesh_terms: D000328:Adult; D015838:Chondromatosis, Synovial / Q000175:diagnosis* / Q000473:pathology; D002813:Chondrosarcoma / Q000175:diagnosis* / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D000074402:Synovectomy; D019224:Temporomandibular Joint Disc / Q000601:surgery; D013705:Temporomandibular Joint Disorders / Q000175:diagnosis* / Q000473:pathology; D014313:Trismus / Q000175:diagnosis