title: Malignant manifestation of benign gastric and duodenal neoplasms.
mesh_terms: D000368:Aged; D004379:Duodenal Neoplasms / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007889:Leiomyoma / Q000175:diagnosis*; D008067:Lipoma / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D011127:Polyps / Q000175:diagnosis; D013274:Stomach Neoplasms / Q000175:diagnosis*