title: [The value of the first endoscopic exam in the differential diagnosis of gastric ulcer (author's transl].
mesh_terms: D001706:Biopsy; D002277:Carcinoma / Q000175:diagnosis; D003937:Diagnosis, Differential; D005773:Gastroscopy; D006801:Humans; D010437:Peptic Ulcer / Q000175:diagnosis* / Q000473:pathology; D013274:Stomach Neoplasms / Q000175:diagnosis* / Q000473:pathology
vernacular_title: Dianośtico diferencial de la ulcera gástrica: utilidad del primer examen endoscópico.