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发病率:胃类癌较罕见,仅占全部类癌的1％,而占胃肠道类癌的2—3％。自1923年Askanazy首先在死检中发现胃类癌后,至1977年文献上约有101例报道。类癌主要发生在胃肠道,其兰尾及回肠是最常见的部位。胃肠道以外的部位如胆囊、胰腺、卵巢及支气管等亦偶有报道。Davis等收集文献上的3718例类癌,其发生的部位如下:食道贲门交界处1例,胃93例,十二指肠135例,空回肠1032例,美克氏憩室42例,兰尾1686例,结肠91例,直肠952例,卵巢34例,
Incidence rate: Gastric cancer is rare, accounting for only 1% of all carcinoids and 2-3% of gastrointestinal carcinoids. Since Askanazy first discovered stomach carcinoids in the deaths in 1923, there were about 101 reports in the literature in 1977. Carcinoids mainly occur in the gastrointestinal tract, and the blue tail and ileum are the most common sites. Outside the gastrointestinal tract, such as gallbladder, pancreas, ovary, and bronchi, have also occasionally been reported. Davis et al. collected 3718 cases of carcinoids in the literature, and the sites of its occurrence were as follows: 1 case at the junction of esophageal and cardia, 93 cases of stomach, 135 cases of duodenum, 1032 cases of empty ileum, 42 cases of MK’s diverticulum, and Lan Mei 1686. Example: 91 cases of colon, 952 cases of rectum, 34 cases of ovary,