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CA19-9 is a protein marker most commonly associated with pancreatic cancer, though it can also be elevated in other gastrointestinal cancers and some non-cancerous conditions like pancreatitis or bile duct blockage. It's primarily used to monitor treatment response and detect

CA-125 is a protein that can be elevated in the blood of women with ovarian cancer, though it can also rise due to other non-cancerous conditions like endometriosis or pelvic inflammatory disease. This test is mainly used to monitor ovarian