Lung cancer test only has high CA125 if it is a benign disease, while ovarian cancer is more serious. 1. Benign diseases, if CA125 is only slightly elevated in lung cancer test, it may be caused by benign diseases, such as pregnancy, uterine polyps, etc. This kind of situation is not too serious, and timely targeted treatment can bring the index back to the normal range. 2. Ovarian cancer, if CA125 is greatly increased, it may be caused by ovarian cancer, and the situation is relatively serious, and further CT, pathological tissue biopsy is needed. Surgery, radiotherapy, chemotherapy and other means of treatment are needed, and it is possible to be cured in the early stage, but it is more difficult to be cured in the middle or late stage.