胆脂瘤在组织学上是良性而生物学上呈侵蚀性损害，病变发展过程中，在胆脂瘤上皮里树状细胞（dendriticcells，DCs）所起的作用有待深入研究。用S－100蛋白染色检查DCS在胆脂痛中存在和分布，以阐明先天性肛脂瘤（CC）与后天性胆脂瘤（AC）在侵蚀性损害生物特性上的差异．16例 Cholesteatoma histologically benign and biologically aggressive damage, the role of dendritic cells (DCs) in the development of cholesteatoma need further study. The presence and distribution of DCS in cholesteatipid was examined using S-100 protein staining to elucidate the differences in biological characteristics of erosive lesions between congenital anal lipoma (CC) and acquired cholesteatoma (AC). 16 cases