A 5-year-old girl is brought to the clinic by her parents, w…
A 5-year-old girl is brought to the clinic by her parents, who report that she has had poor appetite, weight loss, and a bloated abdomen over the past few weeks. They also noticed that she has started limping. On physical examination, she appears pale and quiet; small bruises on her shins and upper arms, hepatomegaly and splenomegaly. No heart or lung abnormalities. Which hematologic malignancy is the most likely diagnosis?