| Theme |
Current topics in interval colorectal cancers |
| Title |
Case of rectal interval cancer detected with surveillance colonoscopy three years post initial colonoscopic polypectomy |
| Author |
Hideyuki Chiba |
Department of Gastroenterology, Omori Red Cross Hospital |
| Author |
Ikuro Koba |
Department of Gastroenterology, Yamaga Chuo Hospital |
| Author |
Jun Tachikawa |
Department of Gastroenterology, Omori Red Cross Hospital |
| Author |
Daisuke Kurihara |
Department of Gastroenterology, Omori Red Cross Hospital |
| Author |
Keiichi Ashikari |
Department of Gastroenterology, Omori Red Cross Hospital |
| Author |
Akihiro Takahashi |
Department of Gastroenterology, Nerima-Hikarigaoka Hospital |
| Author |
Toru Goto |
Department of Gastroenterology, Omori Red Cross Hospital |
| [ Summary ] |
A man in his seventies underwent colonoscopic polypectomy for two adenomatous lesions one year after an initial negative colonoscopy. However, surveillance colonoscopy three years after the previous colonoscopy indicated a laterally spreading tumornon granular depressed type 30 mm in size in the rectum above the peritoneal reflection. Because Narrow Band Imaging (NBI) with magnification and magnifying chromoendoscopy suggested M or SM slight invasion, endoscopic treatment was performed. Histological findings revealed a well-differentiated adenocarcinoma with slight invasion (760 µm) without lymphovascular invasion or budding. It is impossible to know whether a case is due to missed cancer from initial colonoscopy or a rapid growth lesion. This case is significant in terms of being a case report because interval cancer in the rectum is relatively common. Therefore, we must pay attention to LST-NG as exhibiting a high potential for interval cancer. |