CA markers are biomarkers found in blood, urine, or body tissues that can be elevated by the presence of one or more types of cancer. There are many different tumor markers, each indicative of a particular disease process, and they are used in oncology to help detect the presence of cancer. CA15-3/CA27.29 is linked with breast cancer, CA19-9 is linked with Pancreatic cancer, gallbladder cancer, bile duct cancer, and gastric cancer and CA-125 is linked with Ovarian Cancer