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(上接本刊2006年第6期477页)4表皮样囊肿、皮样囊肿和畸胎瘤表皮样囊肿、皮样囊肿和畸胎瘤属先天性肿瘤。其中表皮样囊肿较多见,又称表皮样瘤、胆脂瘤、真性胆脂瘤或珍珠瘤,由残留原始外胚层细胞发展而来。占中枢神经系统肿瘤的1.39%。男性略多于女性,男女比例为1.2∶1。各年龄
(Continued from issue 6, 2006 477) 4 epidermoid cysts, dermoid cysts and teratoma epidermoid cysts, dermoid cysts and teratomas are congenital tumors. Epidermoid cysts are more common, also known as epidermoid tumor, cholesteatoma, true cholesteatoma or pearl tumor, the residual primitive ectodermal cells from the development. Accounting for 1.39% of central nervous system tumors. Male slightly more than female, male to female ratio of 1.2: 1. All ages