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Yes, leukemia can often be detected through a routine blood test known as a complete blood count (CBC). This test measures the number and quality of red blood cells, white blood cells, and platelets in your blood. When there are too many abnormal white blood cells or irregular cell patterns, it can indicate the presence of leukemia. However, while a blood test can raise suspicion, further tests such as a bone marrow biopsy are usually required to confirm the diagnosis and determine the type and stage of the disease. Early detection is very important, as leukemia can progress quickly and timely treatment improves outcomes. If you notice symptoms like fatigue, frequent infections, or unusual bruising, you should consult the Best Cancer Doctor in Delhi for an accurate diagnosis and personalized treatment plan.