what is a dangerous ca125 level

A CA-125 blood test measures the level of the CA-125 protein in the blood, which is a biomarker for ovarian cancer. A normal range for CA-125 is between 0 and 35 U/mL. Levels over 35 U/mL may indicate the presence of cancer or other conditions, but not all patients with a high CA-125 result have cancer. Therefore, a high CA-125 level alone cannot diagnose ovarian cancer. The CA-125 test is used in conjunction with other diagnostic tools, and results should be interpreted by a healthcare provider. Elevated CA-125 levels can also be caused by other conditions such as endometriosis, liver disease, and pregnancy. Therefore, a high CA-125 level does not always mean cancer is present. If a persons CA-125 level is higher than expected, their healthcare provider may recommend other tests and procedures to determine their diagnosis.