Trichilemmoma.
Trichilemmoma is an uncommon cutaneous neoplasm that originates in the outer hair sheath. We are reporting two cases, one of lobular pattern, the other a massing of cells of the follicular infundibulum. In each case, the clinical appearance was nonspecific and the mistaken clinical diagnosis was basal-cell carcinoma.
D000368:Aged; D002280:Basal Cell Carcinoma / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006197:Hair; D006222:Hamartoma / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008297:Male; D012871:Skin Diseases / Q000175:diagnosis / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology