60例鼻咽粘膜增生病变标本,通过电镜超薄切片初步观察,除14例为上皮癌变外,均可见到4种粘膜上皮表现。增生病变粘膜实际上是上皮内淋巴细胞虫蛀状浸润破坏,以及因破坏刺激上皮细胞增生的两个病理过程。增生可有三种形式,其出现视炎性损害程度及持续时间而定。并讨论病变过程癌变的可能性,提出顽固性微小粘膜糜烂可能是鼻咽癌的癌前病变。 60 cases of nasopharyngeal mucosal hyperplasia lesions were observed by electron microscopy ultrathin section. Except for 14 cases of epithelial cancerous lesions, 4 types of mucosal epithelium were observed. The mucosa of proliferative lesions is actually the destruction of the epithelial lymphocyte infestation and the two pathological processes that undermine the proliferation of stimulated epithelial cells. Hyperplasia can have three forms, depending on the extent and duration of inflammatory damage. And discuss the possibility of carcinogenesis in the process of the disease, put forward intractable micromucosal erosion may be precancerous lesions of nasopharyngeal carcinoma.