title: Unexpected Radiologic Findings for a Casting Type of Radiolucent Colorectal Foreign Body Composed of Polyurethane Foam.
abstract: Radiologic diagnosis of colorectal foreign bodies is usually not very difficult, because inserted materials are often clearly visible on plain abdominal radiographs. However, when they are radiolucent, a plain abdominal radiograph has been reported to be useless. As radiolucent colorectal foreign bodies appear as radiolucent artificial contours or air-trapped materials in the pelvis, almost always the diagnosis itself can be made by careful evaluation of plain abdominal radiographs. We encountered a case of casting type of radiolucent colorectal foreign body formed from polyurethane foam. It presented us with unexpected radiologic findings and led to diagnostic difficulties.
authors.affiliation: Department of Radiology, Tokyo Metropolitan Ohtsuka Hospital, 2-8-1 Minamiohtsuka, Toshima-ku, Tokyo 170-8476, Japan; Department of Radiology, Dokkyo Medical University Koshigaya Hospital, 2-1-50 Minamikoshigaya, Koshigaya-shi, Saitama 343-0845, Japan.
authors.forename: Emi
authors.identifier: 0000-0001-7945-2357
authors.initials: E
authors.lastname: Sanjo
authors.affiliation: Department of Radiology, Tokyo Metropolitan Ohtsuka Hospital, 2-8-1 Minamiohtsuka, Toshima-ku, Tokyo 170-8476, Japan.
authors.forename: Fumihiko
authors.initials: F
authors.lastname: Tamamoto
authors.affiliation: Department of Radiology, Tokyo Metropolitan Ohtsuka Hospital, 2-8-1 Minamiohtsuka, Toshima-ku, Tokyo 170-8476, Japan.
authors.forename: Shoichi
authors.initials: S
authors.lastname: Ogawa
authors.affiliation: Department of Radiology, Tokyo Metropolitan Ohtsuka Hospital, 2-8-1 Minamiohtsuka, Toshima-ku, Tokyo 170-8476, Japan.
authors.forename: Maiko
authors.initials: M
authors.lastname: Sano
authors.affiliation: Department of Surgery, Tokyo Metropolitan Ohtsuka Hospital, 2-8-1 Minamiohtsuka, Toshima-ku, Tokyo 170-8476, Japan.
authors.forename: Tetsunori
authors.initials: T
authors.lastname: Yoshimura
authors.affiliation: Department of Radiology, Dokkyo Medical University Koshigaya Hospital, 2-1-50 Minamikoshigaya, Koshigaya-shi, Saitama 343-0845, Japan.
authors.forename: Miwako
authors.initials: M
authors.lastname: Nozaki