title: Asymptomatic anisakiasis of the colon incidentally found by colonoscopy.
abstract: Asymptomatic anisakiasis of the colon is a rare condition that is difficult to diagnose. A 42-year-old man with no symptoms was referred to our department because of elevated serum carcinoembryonic antigen (CEA) levels detected previously at another hospital. A colonoscopy was performed to find the reason for these elevated CEA levels, and Anisakis larvae were identified by chance in the ascending colon wall. This is only the fourth case of asymptomatic anisakiasis of the colon to be reported worldwide.
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan. gtanigu@juntendo.ac.jp.
authors.forename: Gentaro
authors.initials: G
authors.lastname: Taniguchi
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Akihito
authors.initials: A
authors.lastname: Nagahara
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Kenshi
authors.initials: K
authors.lastname: Matsumoto
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Ritsuno
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Igusa
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Sasaki
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Mori
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Kazuko
authors.initials: K
authors.lastname: Beppu
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Tomoyoshi
authors.initials: T
authors.lastname: Shibuya
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Sakamoto
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Taro
authors.initials: T
authors.lastname: Osada
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Kawabe
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Terai
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Ogihara
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Sumio
authors.initials: S
authors.lastname: Watanabe
keywords: Anisakis; Asymptomatic; Colon