| Theme |
The surveillance program after treatment of colorectal cancers |
| Title |
Surveillance after surgical resection of submucosal colorectal cancer |
| Author |
Shungo Endo |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Shin-ei Kudo |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Jun-ichi Tanaka |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Hiroshi Kashida |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Fumio Ishida |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Kazuo Ohtsuka |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Tsukasa Takeuchi |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Eiji Hidaka |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Yoshio Deguchi |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Yuji Yamaguchi |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Koichi Nagata |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author |
Kishiko Tatsukawa |
Digestive Disease Center, Showa University Northern Yokohama Hospital |
| [ Summary ] |
Patients with submucosal invasive (sm) colorectal cancer have better prognosis than those with sm cancer in other parts of the gastrointestinal tract. According to the Multi-institutional Registry of Large Bowel Cancer in Japan, the cumulative 5-year survival rate for patients with sm colorectal cancer is 89.6% in the colon and 93.6% in the rectum. Recently, endoscopic mucosal resection techniques have been established for removing early colorectal cancers, however lymph node metastasis occurs in approximately 10% of cases with sm colorectal cancer and distant metastasis is present in about 2%. The ranges of sm colorectal cancer vary from lesions curable with endoscopic resection alone to lesions beyond surgical treatment. The aims of surveillance after the surgical operations for sm colorectal cancer are monitoring of distant metastasis, metachronous multiple cancers, and synchronous multiple cancers, which might have been overlooked during the first examination. Among these factors, metachronous multiple cancer is the most frequently reported. Laterally spreading tumors and depressed lesions especially, can be easily overlooked and therefore should be carefully searched for. |