Poor prognosis of a subtype of this disease and its potential precursors are linked to a deletion in chromosome 7’s long arm that manifests as a monosomy. Like its MPN and MDS precursors, a subtype of this disease may present with cytoplasmic granules and needle-like Auer rods. A chemotherapeutic 7+3 (“seven plus three”) regimen can treat a subtype of this disease, (-5[1])another subtype of which is treated by orally administering 6MP and methotrexate as part of its maintenance (10[1])therapy. (-5[1])Imatinib treats a form of this disease by inhibiting a (*) BCR-ABL (10[1])fusion protein originating from the Philadelphia chromosome. Subtypes of this disease (10[1])can (10[1])be described as acute (10[2])or chronic (10[1]-5[1])and myeloid or lymphocytic. (10[1]-5[1])An abnormally high white (10[1])blood cell (10[2])count characterizes the (10[1])chronic form of this disease. (-5[1])For 10 points, name this most common pediatric cancer that, like (10[1])myelomas (10[1])and lymphomas, (10[1])may require a bone marrow transplant. (10[2]) (10[2])■END■