When testing for leukemia, what are the tests?

CBC. A complete blood count (CBC) usually is the simplest test to raise a suspicion to do further testing to prove or disprove leukemia. A bone marrow biopsy has traditionally been used to diagnose leukemia. Some leukemias can be diagnosed with a blood test called flow cytometry if there are enough leukemia cells circulating in the blood. A combination of these tests provides a more complete profile.