Cancer of the gastrointestinal tract. Early phases and diagnostic features.
D000230:Adenocarcinoma / Q000175:diagnosis; D001706:Biopsy; D003937:Diagnosis, Differential; D003949:Diagnostic Techniques, Surgical; D004724:Endoscopy; D006801:Humans; D011859:Radiography; D013274:Stomach Neoplasms / Q000145:classification / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D013997:Time Factors