2019 Volume 55 Issue 5 Pages 957-961
Intussusception in children over 5 years of age often has mechanical causes such as polyps, and it is necessary to investigate and remove the causative lesion. We experienced treating a case of an adolescent boy who had intussusception caused by a juvenile polyp in his cecum, on which we found a part showing a malignant transformation. A 7-year-old boy, who had a history of intussusception at age 5, had intermittent abdominal pain and was diagnosed as having intussusception. He was treated by noninvasive reduction successfully, but it recurred after 2 days and he was treated again. He was introduced to our institution to determine the mechanical cause in his intestine. An Ip-type polyp was recognized in his cecum by colonoscopy, and polypectomy was performed endoscopically. A histopathological examination revealed a part showing adenocarcinoma in situ on the tip of the juvenile polyp. This was a single polyp and there was no sign of metastasis. The patient was closely followed-up. It is extremely rare that a malignant transformation is found in a solitary juvenile polyp. However, this possibility has to be taken into consideration when a large polyp with a long history of intussusception is found.
