title: A double patella-like condition secondary to synovial osteochondromatosis.
abstract: To our knowledge, this is the first case of synovial osteochondromatosis in a patient presenting with a double patella-like condition. The true duplication of the patella, which is called double patella, is extremely rare. In our case, the operative and histopathological findings showed that the double patella-like condition was secondarily induced by synovial osteochondromatosis. Synovial osteochondromatosis should be considered as a differential diagnosis for congenital double patella.
authors.affiliation: Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan. kajiyoshi777@yahoo.co.jp.
authors.forename: Yoshiteru
authors.initials: Y
authors.lastname: Kajikawa
authors.forename: Yuji
authors.initials: Y
authors.lastname: Arai
authors.forename: Hisatake
authors.initials: H
authors.lastname: Takamiya
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Higuchi
authors.forename: Gen
authors.initials: G
authors.lastname: Mori
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Morisaki
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Kubo