Bordas X, Lecha V, Herrero C, Palou J
Med Cutan Ibero Lat Am. 1981;9(5):369-76.
Malignant change in some keratinous cysts is a possible but rare condition. It seems acceptable that many publications concerning squamous cell carcinomas arising from previous cysts, actually correspond to the entity which Wilson-Jones called "proliferating epidermoid cyst" and they must be considered as pseudomalignant lesions, despite the presence of some features that may lead to a diagnosis of carcinoma. Although it is rare, which is nowadays called "proliferating Trichilemmal cyst", should be widely acknowledged since its misdiagnosis as squamous cell carcinoma leads to surgical treatment which is more drastic than necessary. Herein is presented an unusually situated case of proliferating Trichilemmal cyst and a review of the principal characteristics that have been pointed out in this tumor.
一些角质囊肿发生恶性变是一种可能但罕见的情况。许多关于先前囊肿引发鳞状细胞癌的出版物，实际上对应的是威尔逊 - 琼斯所称的“增殖性表皮样囊肿”，尽管存在一些可能导致诊断为癌的特征，但将它们视为假恶性病变似乎是可以接受的。虽然罕见，但现今所称的“增殖性外毛根鞘囊肿”应得到广泛认识，因为其被误诊为鳞状细胞癌会导致比必要情况更激进的手术治疗。本文介绍了一例位置异常的增殖性外毛根鞘囊肿病例，并对该肿瘤已指出的主要特征进行综述。
