| Theme |
Current topics in interval colorectal cancers |
| Title |
Case of interval cancer detected in rectum two years post initial colonoscopy |
| 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 woman in her seventies underwent colonoscopy two years post initial colonoscopy. A positive fecal occult blood sample was obtained at one general hospital. A laterally spreading tumor-non granular type 15 mm in size was observed in the rectum below the peritoneal reflection. She was referred to our hospital for treatment. Narrow band imaging (NBI) with magnification and magnifying chromoendoscopy suggested SM massive invasion. The patient selected diagnostic endoscopic treatment rather than surgery because of the location and size of the lesion. Histological findings revealed a well-differentiated adenocarcinoma with deep invasion (2,400 µm) without lymphovascular invasion or budding. It is impossible to know which cases involve missed cancer from initial colonoscopies of rapid lesion growth. This case is significant in terms of being a case report because we can reconfirm the importance of checking the posterior of the fold and fecal occult blood in routine medical care. |