title: [Squamous cell carcinoma arising on an epidermal inclusion cyst: a case presentation and review of the literature].
abstract: Epidermal inclusion cysts are very common lesions that very rarely undergo malignant transformation-in the English-language literature we have only found 18 adequately documented cases. We present the case of a man with a 2-month history of a retroauricular skin lesion in which histological study revealed squamous cell carcinoma arising on an epidermal inclusion cyst. Cysts that grow rapidly, reach a large size, ulcerate, develop a fistula, or that do not respond to medical treatment, and those that recur should be excised completely and histological study performed of the whole lesion.
authors.affiliation: Hospital Povisa, Vigo, España. ianton@povisa.es <ianton@povisa.es>
authors.forename: I
authors.initials: I
authors.lastname: Antón-Badiola
authors.forename: P
authors.initials: P
authors.lastname: San Miguel-Fraile
authors.forename: A
authors.initials: A
authors.lastname: Peteiro-Cancelo
authors.forename: J A
authors.initials: JA
authors.lastname: Ortiz-Rey
mesh_terms: D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D004814:Epidermal Cyst / Q000473:pathology*; D006801:Humans; D008297:Male; D011230:Precancerous Conditions; D012871:Skin Diseases / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*