title: Postauricular sebaceous carcinoma arising in association with nevus sebaceus.
abstract: BACKGROUND
  Sebaceous carcinoma is an uncommon malignant neoplasm usually associated with the ocular adnexa. Despite the widespread anatomic distribution of sebaceous glands, extraocular sebaceous carcinoma occurs with far less frequency.
  
  
  METHODS
  A 27-year-old man was examined with the presenting complaint of a slowly enlarging subcutaneous mass. It was associated with an overlying, irregular, verrucoid epidermal plaque.
  
  
  RESULTS
  Histologic and electron microscopic examination of the mass revealed a malignant sebaceous neoplasm occurring in conjunction with an overlying nevus sebaceus. The dermal neoplasm contained numerous cytoplasmic and stromal hyaline globules.
  
  
  CONCLUSIONS
  We report a case of extraocular sebaceous carcinoma arising in the postauricular region in association with a nevus sebaceus and exhibiting the unusual histologic feature of hyaline globules.
authors.affiliation: Department of Oral Pathology, Biology, and Diagnostic Sciences, Rm. C-829, University of Medicine and Dentistry of New Jersey---New Jersey Dental School, 110 Bergen Street, Newark, NJ 07103-2400, USA.
authors.forename: Joseph
authors.initials: J
authors.lastname: Rinaggio
authors.forename: H Stan
authors.initials: HS
authors.lastname: McGuff
authors.forename: Randal
authors.initials: R
authors.lastname: Otto
authors.forename: Charlene
authors.initials: C
authors.lastname: Hickson
mesh_terms: D000328:Adult; D002277:Carcinoma / Q000150:complications* / Q000473:pathology*; D004428:Ear Neoplasms / Q000150:complications* / Q000473:pathology*; D006801:Humans; D008297:Male; D009506:Nevus / Q000150:complications* / Q000473:pathology*; D012626:Sebaceous Gland Neoplasms / Q000150:complications* / Q000473:pathology*