Carcinoembryonic antigen is most likely produced in a malignancy involving the:

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Multiple Choice

Carcinoembryonic antigen is most likely produced in a malignancy involving the:

Explanation:
Carcinoembryonic antigen is a glycoprotein normally produced during fetal development by cells of the GI tract, especially the colon. In adults, CEA levels rise most reliably in colorectal cancers, where malignant colonic mucosa secretes this antigen into the bloodstream. Because of this strong association, a malignancy involving the colon is the scenario most likely to produce CEA. Other cancers can elevate CEA, but the colon remains the classic source. This marker is used to monitor colorectal cancer treatment and surveillance, though it’s not perfect for diagnosis since elevations can occur in nonmalignant conditions as well.

Carcinoembryonic antigen is a glycoprotein normally produced during fetal development by cells of the GI tract, especially the colon. In adults, CEA levels rise most reliably in colorectal cancers, where malignant colonic mucosa secretes this antigen into the bloodstream. Because of this strong association, a malignancy involving the colon is the scenario most likely to produce CEA. Other cancers can elevate CEA, but the colon remains the classic source. This marker is used to monitor colorectal cancer treatment and surveillance, though it’s not perfect for diagnosis since elevations can occur in nonmalignant conditions as well.

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