Desmoplastic trichilemmoma arising within a nevus sebaceus

Am J Dermatopathol. 1998 Oct;20(5):495-7. doi: 10.1097/00000372-199810000-00013.


A 74-year-old man presented with a tumor on his scalp that he had since birth. The authors observed a verrucous pink crusted plaque. The tumor was clinically diagnosed as nevus sebaceus and was removed. Histopathologic study showed, arising from nevus sebaceus, a lobular neoplasm with the classic features of trichilemmoma. Desmoplasia was present in the center of the trichilemmomatous area. This description is typical of a special, uncommon type of trichilemmoma that histologically mimics invasive carcinoma.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Hamartoma / complications
  • Hamartoma / congenital
  • Hamartoma / pathology*
  • Humans
  • Male
  • Neoplasms, Basal Cell / etiology
  • Neoplasms, Basal Cell / pathology*
  • Scalp / pathology
  • Scalp Dermatoses / complications
  • Scalp Dermatoses / congenital
  • Scalp Dermatoses / pathology*
  • Skin Neoplasms / etiology
  • Skin Neoplasms / pathology*