Doctors use blood tests to look for disease-related signals and to assess your health, but these methods are not used to confirm a diagnosis of ovarian cancer. Abnormal test results may indicate a problem with an organ or system in the body, which may be caused by ovarian cancer or by another health condition. Blood tests in combination with other initial tests can be used to evaluate ovarian cancer, and periodic reviews can also be used to evaluate the effectiveness of treatment and adverse effects of treatment. Which blood tests are commonly used to diagnose ovarian cancer? 1. white blood cell count (WBC); 2. neutrophil ratio (N); 3. lymphocyte ratio (L); 4. red blood cells (RBC); 5. hemoglobin (HGB); 6. red blood cell pressure (HCT); 7. mean red blood cell volume (MCV); 8. mean red blood cell hemoglobin (MCH); 9. mean hemoglobin concentration (MCHC); 10. red blood cell Distribution width variation (RDW); 11, platelets (PLT); 12, mean platelet volume (MPV); 13, platelet specific volume (PCT); 14, platelet distribution width (PDW).