| Theme | Endocrine cell tumors of the colorectum: Difference in concept between WHO classification and Japanese classification | |
|---|---|---|
| Title | Endoscopic diagnosis and treatment of rectal carcinoids | |
| Publish Date | 2019/02 | |
| Author | Makoto Sanomura | Department of Gastroenterology, Hokusetsu General Hospital |
| Author | Ken Kawakami | Second Department of Internal Medicine, Osaka Medical College |
| Author | Kazuki Kakimoto | Second Department of Internal Medicine, Osaka Medical College |
| Author | Yuichi Sasaki | Department of Gastroenterology, Hokusetsu General Hospital |
| Author | Hitoshi Nishitani | Department of Gastroenterology, Hokusetsu General Hospital |
| Author | Keisuke Yokohama | Department of Gastroenterology, Hokusetsu General Hospital |
| Author | Yutaro Egashira | Department of Pathology, Osaka Medical College |
| Author | Yoshinobu Hirose | Department of Pathology, Osaka Medical College |
| Author | Kazuhide Higuchi | Second Department of Internal Medicine, Osaka Medical College |
| [ Summary ] | The guidelines for treatment of gastroenteropancreatic neuroendocrine tumors (NETs) also state recommendations for the diagnosis and treatment of rectal NETs. Endoscopic treatment of rectal NETs is indicated for "NETs ≤ 1 cm in size with no muscularis propria invasion or lymph node metastasis". If pathological assessment of the resected specimen is "no muscularis propria invasion, no lymphovascular invasion, resection margin-negative", follow-up is conducted. In post-endoscopic treatment surveillance for rectal NETs, it is important to accurately assess risk factors during initial treatment. | |