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PSA is a protein produced by the prostate gland, and elevated levels can be a sign of prostate cancer, though they can also rise due to benign conditions like an enlarged prostate (BPH) or prostatitis. This test is used to

CEA is a protein that can be elevated in several types of cancer, most notably colorectal cancer, but also in lung, breast, and other cancers. This test is mainly used to monitor treatment response and check for cancer recurrence rather