The difference between peptic ulcer of the stomach and peptic ulcer of the duodenum.
D003937:Diagnosis, Differential; D004379:Duodenal Neoplasms / Q000175:diagnosis; D004381:Duodenal Ulcer / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D013274:Stomach Neoplasms / Q000175:diagnosis; D013276:Stomach Ulcer / Q000175:diagnosis* / Q000601:surgery