A tumor marker is a substance found in your blood, pee, or body tissue. The expression "tumor markers" may allude to proteins that are made by both solid cells and malignant growth cells in the body. It might likewise allude to transformations, changes, or examples in a tumor's DNA. Tumor markers are likewise called biomarkers. Tumor markers are substances, normally proteins, created by the body in light of malignancy development or by disease tissue itself. Their identification and estimation in blood plasma, pee or tissue can assist with distinguishing and help finding of certain sorts of malignant growth, anticipate and screen reaction to treatment and identify repeat.