The clinical, histopathological, and histochemical features of 32 trichofolliculomas from 32 patients are analyzed. Trichofolliculoma is a benign tumor that is not diagnostic clinically but most often resembles a sebaceous cyst. Histologically these tumors have a large central cystic hair follicle with many epithelial buds and strands branching from the walls. These epithelial proliferations show all stages of pilar formation. The abortive hair follicles are often grouped and are surrounded by a prominent lobulated stroma. Glycogen is abundant in the walls of the abortive hair follicles.
GRAY HR, HELWIG EB. Trichofolliculoma. Arch Dermatol. 1962;86(5):619–625. doi:10.1001/archderm.1962.01590110055008
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