title: Perineal adenocarcinoma thirty years after proctocolectomy: report of a case.
abstract: This report describes an adenocarcinoma arising in the perineum 30 years after two-stage total proctocolectomy for ulcerative colitis. This is one of the longest intervals reported between resection and presentation with cancer and also the only case in which the tumor is clearly free of association with existing bowel. The mass originally presented as a perineal mucocele, an unusual complication of proctocolectomy for ulcerative colitis, and this is the first such mucocele to demonstrate malignant transformation.
authors.affiliation: Brown Medical School, Providence, Rhode Island, USA.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Kurtz
authors.forename: Tomas M
authors.initials: TM
authors.lastname: Heimann
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis* / Q000601:surgery; D001706:Biopsy; D003093:Colitis, Ulcerative / Q000601:surgery; D003937:Diagnosis, Differential; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D019042:Muscle Neoplasms / Q000175:diagnosis* / Q000601:surgery; D010502:Perineum; D049268:Positron-Emission Tomography; D016737:Proctocolectomy, Restorative / Q000009:adverse effects*; D013997:Time Factors; D014057:Tomography, X-Ray Computed