title: Large synovial osteochondromatosis arising from the interphalangeal joint of the thumb: a case report and review of the literature.
abstract: A 38-year-old woman presented with a very large synovial chondromatosis arising from the interphalangeal joint of the thumb. The tumor surrounded the interphalangeal joint and its size was approximately 3 cm. The range of motion was almost fused. Plain radiographs showed an extra-osseous tumor shadow with calcifications. The patient had no local recurrence at one year of follow-up after marginal resection of the tumor and synovectomy. Because this case showed no osteoarthritic changes, it can be classified as primary synovial chondromatosis with a tumor-like nature. Based on the clinical course and pathological report, our synovial chondromatosis case can be classified as Milgram stage 3. Our case report is unique in three respects: i) origin from the interphalangeal joint of the thumb, ii) a single lump of mass and iii) extremely large size. To our knowledge, a similar type of synovial chondromatosis has not been previously reported in the English literature.
authors: Department of Orthopedic Surgery, Yamaguchi University School of Medicine, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan. muramatu@yamaguchi-u.ac.jp.
authors: Keiichi
authors: K
authors: Muramatsu
authors: Takahiro
authors: T
authors: Hashimoto
authors: Yasuhiro
authors: Y
authors: Tominaga
authors: Toshihiko
authors: T
authors: Taguchi
mesh_terms: D000328:Adult; D015838:Chondromatosis, Synovial / Q000175:diagnosis* / Q000601:surgery*; D003937:Diagnosis, Differential; D005260:Female; D005384:Finger Joint / Q000473:pathology / Q000601:surgery; D006801:Humans; D013933:Thumb / Q000473:pathology / Q000601:surgery
keywords: Synovial osteochondromatosis; interphalangeal joint; synovectomy; thumb