title: Parachordoma with multiple metastases.
abstract: We present a very rare case of parachordoma with local aggressiveness and widespread metastases. A 68-year-old male presented with a mass in his left calf. The lesion was depicted as a poorly marginated mass with inhomogeneous signal intensity on magnetic resonance imaging. The tumor invaded surrounding muscles, neurovascular bundles, and bones. Widespread metastasis to lung, bone, and skin developed after amputation surgery. The histologic features of primary and metastatic lesions were the same and consistent with parachordoma.
authors.affiliation: Department of Orthopedic Surgery, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan. satoshi@med.teikyo-u.ac.jp
authors.forename: Satoshi
authors.initials: S
authors.lastname: Abe
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Imamura
authors.forename: Arimi
authors.initials: A
authors.lastname: Harasawa
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Ishida
authors.forename: Kazutoshi
authors.initials: K
authors.lastname: Unno
authors.forename: Akio
authors.initials: A
authors.lastname: Tateishi
authors.forename: Toru
authors.initials: T
authors.lastname: Tokizaki
authors.forename: Jyun
authors.initials: J
authors.lastname: Yorikawa
authors.forename: Takashi
authors.initials: T
authors.lastname: Matsushita
mesh_terms: D000368:Aged; D001859:Bone Neoplasms / Q000556:secondary*; D006801:Humans; D007866:Leg / Q000473:pathology; D008175:Lung Neoplasms / Q000556:secondary*; D008297:Male; D019042:Muscle Neoplasms / Q000556:secondary*; D011859:Radiography; D012983:Soft Tissue Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery