title: Tenosynovial osteochondromatosis of the tarsal tunnel.
abstract: A case of tenosynovial osteochondromatosis in the tarsal tunnel in a 23-year-old man is presented. The lesion was treated surgically, and multiple osteochondromas were excised, which had no continuity with any tarsal bone or joint cavity but did with the sheaths of the flexor digitorum longus and flexor hallucis longus. Histologic examination of the lesion showed a fibrous capsule, hyaline cartilage and extensive areas of cancellous bone. Necrosis and mitosis were absent in the hyaline cartilage and there were no synovial nodules indicative of synovial metaplasia. The macroscopic findings showed "end-stage" tenosynovial osteochondromatosis. There was no evidence of recurrence 5 years after operation, and the patient remains free of symptoms.
authors.affiliation: Department of Orthopaedic Surgery, Saiseikai Nara Hospital, 4-643 Hachijo, Nara-shi, Nara, 6308145 Japan, kzort@m3.kcn.ne.jp
authors.forename: Kazuya
authors.initials: K
authors.lastname: Sugimoto
authors.forename: Makoto
authors.initials: M
authors.lastname: Iwai
authors.forename: Kenji
authors.initials: K
authors.lastname: Kawate
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yajima
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Takakura
mesh_terms: D000328:Adult; D000842:Ankle; D015838:Chondromatosis, Synovial / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018216:Osteochondromatosis / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D012865:Skiing / Q000293:injuries; D013639:Tarsal Bones / Q000293:injuries* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed