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. (-5[1])Like its MPN and MDS precursors, a subtype of this disease may present (15[1])with cytoplasmic granules and needle-like Auer rods. (15[1])A chemotherapeutic (15[1])7+3 regimen can treat a subtype of this disease, (15[1])another subtype of which is treated by orally administering (15[1])6MP and methotrexate as part of its maintenance therapy. Imatinib treats a form (15[1])of this disease (-5[1])by inhibiting a (*) BCR-ABL (10[1])fusion protein (10[1])originating from the Philadelphia chromosome. (10[2])Subtypes of this disease can be described as acute or chronic and myeloid or lymphocytic. An abnormally high white blood cell count (10[1])characterizes the chronic form of this disease. For 10 points, name this most common pediatric cancer which, like (10[1])myelomas (10[1])and lymphomas, (10[1])may require (10[1])a bone marrow transplant. (10[1])■END■