title: Unusual presentation of anorectal carcinoma.
mesh_terms: D000038:Abscess / Q000209:etiology*; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012002:Rectal Diseases / Q000209:etiology*; D012004:Rectal Neoplasms / Q000150:complications*