Which disease is cancer of white blood cells?

• A. Leukemia
• B. Lymphoma
• C. Myeloma
• D. Thrombocytopenia

Answer: (A)

Cancer of white blood cells is leukemia. Leukemia involves malignant, uncontrolled production of white blood cells in the bone marrow that spill into the blood, crowding out normal cells and causing problems like fatigue, infections, and anemia. The term itself reflects white blood cells and blood.

Lymphoma, by contrast, is cancer of lymphocytes that usually forms solid tumors in lymph nodes and other tissues rather than spreading as abnormal cells in the blood. Myeloma (multiple myeloma) is cancer of plasma cells in the bone marrow, affecting antibody production and bone health, not a broad cancer of white blood cells. Thrombocytopenia is not cancer at all; it’s a low platelet count, a blood disorder that raises bleeding risk.