• 作者：R. Haro ; ^{rosharam@yahoo.es} ; E. Gonzá ; lez-Guerra ; M.C. Fariñ ; a ; L. Martí ; n-Moreno ; L. Requena
• 关键词：cuerno tricolé ; mico ; queratosis tricolemal ; tumor folicular ; queratinizació ; n tricolé ; mica
• 刊名：Actas Dermo-Sifiliogr¨¢ficas
• 出版年：2009
• 出版时间：February 2009
• 年：2009
• 卷：100
• 期：1
• 页码：65-68
• 全文大小：392 K

Trichilemmal horn, or trichilemmal keratosis, is an uncommon benign neoplasm of follicular lineage with trichilemmal differentiation.

The essential characteristics of this tumor are its clinical presentation in the form of a cutaneous horn with trichilemmal keratinization apparent in the histology study (with a hyperplastic epithelium giving rise to dense, orthokeratotic eosinophilic keratin).

We present a new case of this type of tumor in an 82-year-old woman who developed a solitary lesion on her scalp after surgical removal of a trichilemmal cyst. On the basis of the pathology report, the tumor was diagnosed as trichilemmal horn.

We review the 33 reports of this tumor in the literature to date.