title: Rosai-Dorfman disease of the colon presented as small solitary polypoid lesion.
abstract: Rosai-Dorfman disease (RDD) was formerly known as "sinus histiocytosis with massive lymphadenopathy", and cases involving the gastrointestinal tract are rare. We present a case of pure extranodal RDD, resected as a polypoid lesion in colonoscopic study. The patient was a 62-year old woman with a history of sigmoidectomy for unexplained peritonitis. Microscopic study of the polypoid lesion showed the submucosal mass with histological and immunological features of RDD. The whole body computed tomography revealed neither lymphadenopathy nor tumor-like mass.
authors.affiliation: Department of Surgery and.
authors.forename: Munenori
authors.initials: M
authors.lastname: Ide
authors.forename: Takayuki
authors.initials: T
authors.lastname: Asao
authors.forename: Takatomo
authors.initials: T
authors.lastname: Yoshida
authors.forename: Junko
authors.initials: J
authors.lastname: Hirato
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Shimura
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Morinaga
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Shitara
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Ishizaki
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kuwano