Nate had a bone marrow transplant, and after several tests it was confirmed that he had abnormally high levels of white blood cells. Which disease will the patient most likely be diagnosed with?

Leukemia is a cancer of blood-forming tissues, including bone marrow, and commonly causes an abnormally high number of white blood cells. Multiple sclerosis and rheumatoid arthritis are autoimmune diseases, while adenoiditis is inflammation of the adenoids. The most likely diagnosis is leukemia (choice C).

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