title: Encapsulated thymoma metastasizing to a pectoralis major muscle.
abstract: An extensive review of the literature suggests that ours is the first case of encapsulated thymoma metastasizing to a skeletal muscle. A 43-year-old man underwent thymothymectomy for encapsulated Masaoka's stage I thymoma. Four years after complete resection, the tumor metastasized to the left pectoralis major muscle. Although a few reports exist on encapsulated thymoma metastasizing to a distant site, the literature does not describe encapsulated thymoma metastasizing to a skeletal muscle insofar as we could find.
authors.affiliation: Division of Thoracic Oncology, National Cancer Center Research Institute, East, 6-5-1 Kashiwanoha, Kashiwa, Chiba 277-8577, Japan.
authors.forename: Yasuhisa
authors.initials: Y
authors.lastname: Ohde
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yokose
authors.forename: Junji
authors.initials: J
authors.lastname: Yoshida
authors.forename: Taketoshi
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Kanji
authors.initials: K
authors.lastname: Nagai
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D019042:Muscle Neoplasms / Q000556:secondary* / Q000601:surgery; D010369:Pectoralis Muscles; D013945:Thymoma / Q000473:pathology / Q000556:secondary* / Q000601:surgery; D013953:Thymus Neoplasms / Q000473:pathology*