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This is the largest prognostic study of each tumour marker in advanced disease and it clarifies previous conflicting reports. Serum AFP, CA19-9 and immunohistochemical stains beta HCG and C-erb B-2 have no prognostic significance. Serum CEA, beta HCG, CA125 in advanced colorectal cancer prior to chemotherapy do convey an independent poor prognosis which may reflect not just tumour burden but aggressive biology.

These data, particularly in respect to carcinoid tumors, are encouraging, especially since serious complications from treatment were limited. This regimen is not generally toxic, is well tolerated, and offers useful palliation and symptom control in patients with disease that does not respond to simple pharmacologic manipulations.

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