Final answer:
Nate is most likely to be diagnosed with leukemia.
Step-by-step explanation:
Nate's abnormally high levels of white blood cells after a bone marrow transplant are indicative of leukemia. Leukemia is a type of cancer that affects the blood and bone marrow, causing an overproduction of abnormal white blood cells. This can be confirmed through specific diagnostic tests.
Learn more about Leukemia and high levels of white blood cells