Q. A 7-year-old Latino boy is admitted to the hospital due to abdominal pain. Several days ago, it started as an aching pain and gradually increased and became associated with occasional vomiting. She has lost her appetite. She also complains of night pain in both legs, which wakes her up. The family and medical histories are not remarkable. On physical examination, she seems lethargic and pale, with a temperature of 38.2 degrees Celsius (100.7 degrees Fahrenheit); other vital signs are normal. She has multiple inguinal and cervical lymphadenopathies (lymph nodes larger than 15 mm), hepatomegaly (liver edge is palpated 2 cm below the right costal margin), and splenomegaly (spleen edge is palpated 4 cm below the left costal margin). Other physical exam findings are insignificant. On lab tests, peripheral blood hematocrit is 36%, leukocyte count is 74,000/mm3, and platelet count is 87,000/mm3. The peripheral blood smear shows numerous blasts, and flow cytometry reveals lymphoid antigens on these blasts. Which of the following is true regarding this child's diagnosis?