类癌(carcinoid)生长缓慢,有别于一般癌瘤之生长迅速。又因类癌来自消化道粘液腺底部的嗜银细胞,故又称嗜银细胞瘤。类癌可发生在除食管外的消化道各部。在消化道中直肠类癌发生率占第三位。直肠类癌不多见,邹、吴氏各报告1例。我院1978年3月～1979年8月普查了西城区的8万职工,直肠指检51,760 Carcinoids grow slowly and are different from normal cancers. Because of the carcinoid cells from the bottom of the digestive tract of eutrophic eutrophic cells, it is also known as argentiocytoma. Carcinoids can occur in all parts of the digestive tract except the esophagus. In the digestive tract, the incidence of rectal carcinoids accounted for the third place. Rectal cancer is rare, Zou and Wu each reported 1 case. In our hospital from March 1978 to August 1979, we surveyed 80,000 workers in the Xicheng District, with a digital rectal examination of 51,760.