A nurse is reviewing the diagnostic tests of a client suspected of having leukemia. The laboratory report shows elevated levels of blast cells in the peripheral blood. Which test result supports the suspicion of leukemia?

A) This choice is incorrect because fatigue and weakness are common symptoms in leukemia, but they are not specific enough to confirm the diagnosis on their own.

B) This choice is correct. Night sweats and fever are classic symptoms of leukemia, especially in cases of acute leukemia. These symptoms are related to the presence of abnormal white blood cells in the bloodstream and their impact on the body's immune response.

C) This choice is incorrect because unexplained weight gain is not a typical symptom of leukemia. Weight loss is more commonly associated with this condition due to decreased appetite and increased energy expenditure.

D) This choice is incorrect because persistent headaches are not specific to leukemia and may indicate other underlying health issues.

A) This choice is incorrect because an elevated red blood cell count is not a typical finding in leukemia. Leukemia is characterized by the overproduction of white blood cells, not red blood cells.

B) This choice is correct. Leukemia is associated with an elevated white blood cell count, particularly an abnormal increase in blast cells, which are immature cells indicative of leukemia.

C) This choice is incorrect because an elevated platelet count is not a typical finding in leukemia. Leukemia is more commonly associated with thrombocytopenia, which is a decreased platelet count.

D) This choice is incorrect because the laboratory report indicating elevated levels of blast cells in the peripheral blood supports the suspicion of leukemia, not the blast cells' presence in the bone marrow.