True about carcino-embryonic antigen (CEA):
a. Useful for screening of Ca. colonb. Gives confirmative evidence of Ca. colon
c. Helpful for follow-up after resection
d. Levels decrease immediately after resection of tumor
e. none of above
Ans. is a and c i.e. Useful for screening of Ca. colon; and Helpful for follow-up after resection
• Tumor marker
Tumor marker is a biochemical indicator of the presence of
tumor.
Tumor marker cannot be construed as primary modalities for
the diagnosis of cancer.
•
Utility of tumor marker
— To support the diagnosis
— To determine the response of therapy
— To indicate relapse during the follow up period.
• CEA (carcino embryonic antigen)
— CEA is a tumor marker
— it normally produced in the embryonic tissue of gut,
pancreas and liver.
— It is a complex glycoprotein
