Which is better to be able to catch a malignancy of gastrointestinal tract, endoscopy plus colonoscopy or computed tomography with a contrast agent?
Endoscopy plus colonoscopy with biopsy.
CT with contrast can tell about location but for confirmation, tissue biopsy has to be done for which endoscopy plus colonoscopy is required.
Depends where the tumour is, "gastrointestinal tract" is not very specific. If colon, endoscopy and biopsy would be the gold standard. If colonoscopy is not possible for whatever reason, you could try CT guided biopsy. Small bowel; if not within reach of ileoscopy via colonoscopy, CT enterography would be helpful, as would capsule endoscopy. In facilities which have the necessary resources, intubation of the entire small intestine can be performed as a dual procedure from above [upper GI] and below. Hope that helps.....Professor Singh-Ranger
Both ways are necessary, but the first screening procedure would be the CT
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