[Preliminary evaluation of diagnostic accuracy of combination of contrast study and ultrasonography for gastrointestinal malignant tumors].
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D011859:Radiography; D014463:Ultrasonography