title: Case for diagnosis: poorly differentiated "signet-ring" adenocarcinoma.
mesh_terms: D000230:Adenocarcinoma / Q000209:etiology*; D000328:Adult; D003560:Cysts / Q000151:congenital*; D005260:Female; D006801:Humans; D012002:Rectal Diseases / Q000151:congenital; D012004:Rectal Neoplasms / Q000209:etiology*