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类癌(Carcinoid源自德语的Karzinoide),又称类癌瘤,是一组来源于嗜银细胞的低度恶性肿瘤,其临床表现、组织化学和生物学特征因其发生部位不同而异。90%以上类癌发生于胃肠道,并能分泌多种肽类和生物胺(如5-HT),引起类癌综合征。人群中消化道类癌发病率约为(1~4)/10万人[1],但因部分患者无典型临床表现而常常被误诊和忽视,所以其实际发病率应
Carcinoid (Carcinoid from German Karzinoide), also known as carcinoid tumor, is a group of low malignant tumors derived from argyrophilic cells, its clinical manifestations, histochemical and biological characteristics vary according to their site of occurrence. More than 90% of carcinoid tumors occur in the gastrointestinal tract, and can secrete a variety of peptides and biogenic amines (such as 5-HT), causing carcinoid syndrome. The incidence of gastrointestinal carcinoid in the population is about (1 ~ 4) / 100000 [1], but some patients are often misdiagnosed and ignored because of their typical clinical manifestations, so the actual incidence should be