title: [Keratoacanthoma of the anal margin].
abstract: We report the case of a keratoacanthoma of the anal margin in a 34 year-old man. Initial biopsies were negative. Diagnosis was made by histological examination of the surgical specimen. Nine cases of perianal keratoacanthoma have been previously reported in the literature. Our case is remarkable because of the young age of the patient. We discuss the differential diagnosis of anal keratoacanthoma that must be distinguished from well-differentiated squamous cell carcinoma.
authors.affiliation: Service d'Anatomie et de Cytologie Pathologiques, CHR d'Orléans.
authors.forename: Annabel
authors.initials: A
authors.lastname: Maruani
authors.forename: Patrick
authors.initials: P
authors.lastname: Michenet
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Lagasse
authors.forename: Anne
authors.initials: A
authors.lastname: Heitzmann
authors.forename: Rémy
authors.initials: R
authors.lastname: Kerdraon
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Vaur
authors.forename: Ludovic
authors.initials: L
authors.lastname: Martin
mesh_terms: D000328:Adult; D017668:Age of Onset; D001004:Anus Diseases / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery*; D001005:Anus Neoplasms / Q000175:diagnosis; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D007636:Keratoacanthoma / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery*; D008297:Male