类癌是一种神经内分泌癌。 1914年Ｇｏｓｓｅｔｔ[1] 发现类癌源于肠腺腺管基部的嗜银细胞 (Ｋｕｌｔｓｃｈｉｔｚｋｙ细胞 ,Ｋ细胞 )。Ｋ细胞最初被认为起源于胚胎的神经嵴 ,但近年来研究发现它可能来源于内胚层或多潜能分化特征的支气管上皮干细胞[1,2～ 5] 。类癌可发生于几 Carcinoid is a neuroendocrine carcinoma. In 1914 Gossett [1] found that the carcinoid was derived from the basophilic eutrophine cells (Kultschitzky cells, K cells). K-cells were originally thought to have originated from embryonic neural crest, but in recent years it has been found that it may originate from bronchial epithelial stem cells characterized by endodermal or multipotential differentiation [1,2-5]. Carcinoid can occur in several