Abstract
A 61-year-old man admitted to the hospital because of scybalous stool had no noteworthy abdominal findings. A submucosal tumor 2 cm in diameter was found at the transverse colon by fiberoptic colonoscopy. He underwent laparoscopic-assisted transverse colectomy with a suspicion of GIST of the transverse colon. Microscopically, the submucosal tumor consisted of Anisakis body and hyperplastic nodule. Anisakiasis is an infection of the stomach, less frequently the small intestine, and rarely, of other organs. This case of Anisakiasis of the transverse colon which lacked recognizable acute abdominal symptoms is rare, and it is inferred that larvae of the family Anisakidae might naturally have died and been absorbed.
