title: Ectopic hamartomatous thymoma growing in the sternocleidomastoid muscle masquerading as sarcoma.
abstract: The distinction between ectopic hamartomatous thymoma and sarcoma is difficult, and preoperative biopsy and intraoperative histopathological examination fail to give a definitive diagnosis. It is important to recognise ectopic hamartomatous thymoma as one of the differential diagnoses of a cervical tumour.
authors.affiliation: Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
authors.forename: Eri
authors.initials: E
authors.lastname: Iida
authors.forename: Mutsumi
authors.initials: M
authors.lastname: Okazaki
authors.forename: Shunji
authors.initials: S
authors.lastname: Sarukawa
authors.forename: Toru
authors.initials: T
authors.lastname: Motoi
authors.forename: Yoshinao
authors.initials: Y
authors.lastname: Kikuchi
mesh_terms: D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D005260:Female; D006222:Hamartoma / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D009135:Muscular Diseases / Q000175:diagnosis* / Q000601:surgery; D009334:Neck Muscles / Q000601:surgery*; D012509:Sarcoma / Q000175:diagnosis; D013945:Thymoma / Q000175:diagnosis* / Q000601:surgery; D013953:Thymus Neoplasms / Q000175:diagnosis* / Q000601:surgery