A malignant neoplasm of the hematopoietic stem cells and characterized by an excessive number of abnormal white blood cells is:

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Leukemia is a malignant neoplasm of the hematopoietic stem cells that results in the excessive production of abnormal white blood cells. Hemophilia is a genetic disorder characterized by a deficiency in one of the blood clotting factors, thrombocytopenic purpura is a condition in which the number of platelets in the blood is abnormally low, and DiGeorge syndrome is a genetic disorder that affects the development of several organs, including the heart and thymus gland.

A Malignant Neoplasm of the Hematopoietic Stem Cells and Characterized