title: Unsuspected anal cancer discovered after minor anorectal surgery.
mesh_terms: D000328:Adult; D000368:Aged; D001004:Anus Diseases / Q000601:surgery*; D001005:Anus Neoplasms / Q000175:diagnosis* / Q000473:pathology; D001706:Biopsy; D002280:Basal Cell Carcinoma / Q000175:diagnosis; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis; D002295:Carcinoma, Transitional Cell / Q000175:diagnosis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010212:Papilloma / Q000175:diagnosis; D012002:Rectal Diseases / Q000601:surgery*