Simo, A C [Perianal basal cell carcinoma extending into the anal canal]. [electronic resource] - Gastroenterologie clinique et biologique Mar 2008 - 337-8 p. digital Publication Type: Case Reports; Letter ISSN: 0399-8320 Standard No.: 10.1016/j.gcb.2007.07.004 doi Subjects--Topical Terms: AgedAnal Canal--pathologyCarcinoma, Basal Cell--pathologyFemaleHumansSkin Neoplasms--pathology