title: [Two cases of circumferential rectal invasion from prostatic cancer].
abstract: We report two cases of prostatic cancer invading the rectum with circumferential rectal wall thickening. In both cases, reddish and uneven edematous mucosa was observed by colonoscopy and the boundary of the lesion was indistinct. No mass or ulcer formation was not observed. CT scan showed irregular prostatic swelling and circumferential rectal wall thickening adjacent to the prostate. The rectal biopsy specimen showed moderately to poorly differentiated adenocarcinoma, and it was positive on PSA immunostaining. Although rectal invasion of prostatic cancer is relatively rare, it is important to be aware that prostatic cancer can cause circumferential stenosis of the rectum.
authors.affiliation: Department of Gastroenterology, Nanpuh Hospital, Japan. takako-k@ba3.so-net.ne.jp
authors.forename: Takako
authors.initials: T
authors.lastname: Imamura
authors.forename: Shunji
authors.initials: S
authors.lastname: Shimaoka
authors.forename: Koutarou
authors.initials: K
authors.lastname: Tashiro
authors.forename: Tatsuyuki
authors.initials: T
authors.lastname: Niou
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Nishimata
authors.forename: Kouichirou
authors.initials: K
authors.lastname: Tsukasa
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Torimaru
authors.forename: Akio
authors.initials: A
authors.lastname: Matsuda
authors.forename: Toru
authors.initials: T
authors.lastname: Niihara
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Nishimata
authors.forename: Masahide
authors.initials: M
authors.lastname: Hori
authors.forename: Hiroto
authors.initials: H
authors.lastname: Nishimata
authors.forename: Sadao
authors.initials: S
authors.lastname: Tanaka
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D008297:Male; D009361:Neoplasm Invasiveness; D011471:Prostatic Neoplasms / Q000473:pathology*; D012004:Rectal Neoplasms / Q000473:pathology*