title: Collision tumor of apocrine carcinoma and squamous carcinoma occurring in the ear.
abstract: An unusual case of a cutaneous collision tumor comprised of a squamous cell carcinoma and an apocrine carcinoma occurring in the auricle of an 82-year-old man is presented. Microscopic study confirmed 2 distinct tumors: a squamous cell carcinoma arising in the epidermis and an adjacent apocrine carcinoma. We discuss the diagnostic criteria and review pertinent recent literature. To our knowledge, this is the first English language report of such a collision tumor.
authors.affiliation: Department of Pathology, Veterans' Affairs Medical Center, New Orleans, LA 70112, USA. glorus@lsuhsc.edu
authors.forename: Giovanni D
authors.initials: GD
authors.lastname: Lorusso
authors.forename: Deba P
authors.initials: DP
authors.lastname: Sarma
authors.forename: Mary
authors.initials: M
authors.lastname: Fazekas-May
authors.forename: James
authors.initials: J
authors.lastname: Roth
authors.forename: Syeda F
authors.initials: SF
authors.lastname: Sarwar
mesh_terms: D000368:Aged; D001050:Apocrine Glands; D002294:Carcinoma, Squamous Cell / Q000473:pathology* / Q000601:surgery; D004428:Ear Neoplasms / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000473:pathology* / Q000601:surgery; D013544:Sweat Gland Neoplasms / Q000473:pathology* / Q000601:surgery