[Recent progress in the study of tumors].
D000818:Animals; D004796:Clinical Enzyme Tests; D003581:Cytodiagnosis; D004724:Endoscopy; D005336:Fiber Optic Technology; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis; D006801:Humans; D009369:Neoplasms / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000532:radiotherapy; D011859:Radiography; D011863:Radioimmunoassay