title: Hypokalemia due to massive villous adenoma of the rectum.
mesh_terms: D000236:Adenoma / Q000150:complications*; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007008:Hypokalemia / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D012004:Rectal Neoplasms / Q000150:complications*