移行细胞性一穴肛源癌(简称一穴肛癌)为肛门直肠区来自泄殖腔源带移行上皮的一种特殊类型的肿瘤,临床上颇为罕见。近年来国内外文献有散在报道。本文复习有关文献,扼要综述如下。 一穴肛源癌的胚胎发生及病理形态 人类的胚胎发育过程中,咽颊膜和泄殖腔膜代表了两个独特的区带,该处的内胚层和外胚层直接相连, Transitional cell-type one-hole anal cancer (referred to as an anal cancer) is a special type of tumor in the anorectal area that originates from the cloacal cavity-derived transitional epithelium and is clinically rare. In recent years, domestic and foreign literature has scattered reports. This article reviews the relevant literature and summarizes them briefly. Embryogenesis and Pathomorphology of One-Spot Anogenous Carcinoma During the embryonic development of humans, the pharyngeal and cryptocardial membranes represent two distinct zones where the endoderm and ectoderm are directly connected.