We read with interest the article by Altman et al1 published in the February 1995 issue of the Archives. The authors reported a series of 10 cases of trichoblastic fibroma and they described a plaque variant of this neoplasm as a new and previously undescribed clinicopathologic variant of trichoblastic fibroma. We have some reservations about the terminology used in this article, such as the naming of the benign follicular neoplasms composed of germinative cells, and about the conclusions of the authors.
In 1970 Headington2 described the hair germ tumors as benign epithelial-mesenchymal neoplasms of the skin in which hair follicle development may be partly or completely recapitulated. The epithelial component was interpreted as equivalent to the hair germ and the mesenchymal component as equivalent to the follicular papilla. Depending on the combination of epithelial and mesenchymal components and the evidence of what Headington termed stromal induction, he classified
scalonilla P, Requena L. Plaque Variant of Trichoblastic Fibroma. Arch Dermatol. 1996;132(11):1388-1390. doi:10.1001/archderm.1996.03890350132027