title: Rectal villous adenoma producing hypokalemia.
mesh_terms: D000236:Adenoma / Q000150:complications / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D000367:Age Factors; D006801:Humans; D007008:Hypokalemia / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D012004:Rectal Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D013997:Time Factors