title: Cancer of the gastrointestinal tract. Diagnostic fiberoptic gastroscopy.
mesh_terms: D001706:Biopsy; D002277:Carcinoma / Q000175:diagnosis; D003937:Diagnosis, Differential; D005336:Fiber Optic Technology / Q000295:instrumentation; D005756:Gastritis / Q000175:diagnosis; D005773:Gastroscopy; D006801:Humans; D008223:Lymphoma / Q000175:diagnosis; D010437:Peptic Ulcer / Q000175:diagnosis; D011127:Polyps / Q000175:diagnosis; D013274:Stomach Neoplasms / Q000175:diagnosis* / Q000473:pathology; D013997:Time Factors