title: Perianal metastasis of non-small cell lung cancer.
abstract: We herein present the case of a 36-year-old woman who developed perianal metastasis of non-small cell lung cancer that was diagnosed based on the presence of symptoms mimicking a hemorrhoid. The patient initially underwent radiotherapy for a left superior sulcus tumor, then subsequently complained of a perianal mass that had prolapsed and bled. The tumor was removed via resection. Histologically, the mass was diagnosed as poorly differentiated carcinoma and considered to be a metastatic lesion arising from the primary lung cancer.
authors.affiliation: Division of Thoracic Oncology, Shizuoka Cancer Center, Japan.
authors.forename: Hisao
authors.initials: H
authors.lastname: Imai
authors.forename: Kenji
authors.initials: K
authors.lastname: Inafuku
authors.forename: Kazushige
authors.initials: K
authors.lastname: Wakuda
authors.forename: Akira
authors.initials: A
authors.lastname: Ono
authors.forename: Tetsuhiko
authors.initials: T
authors.lastname: Taira
authors.forename: Hirotsugu
authors.initials: H
authors.lastname: Kenmotsu
authors.forename: Reiko
authors.initials: R
authors.lastname: Watanabe
authors.forename: Tateaki
authors.initials: T
authors.lastname: Naito
authors.forename: Haruyasu
authors.initials: H
authors.lastname: Murakami
authors.forename: Ichiro
authors.initials: I
authors.lastname: Ito
authors.forename: Masahiro
authors.initials: M
authors.lastname: Endo
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Tanabe
authors.forename: Takashi
authors.initials: T
authors.lastname: Nakajima
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Takahashi
mesh_terms: D000328:Adult; D001005:Anus Neoplasms / Q000473:pathology / Q000556:secondary*; D002289:Carcinoma, Non-Small-Cell Lung / Q000000981:diagnostic imaging / Q000473:pathology / Q000556:secondary*; D003937:Diagnosis, Differential; D005260:Female; D006484:Hemorrhoids / Q000175:diagnosis; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography