<s>[INST] <<SYS>> This is a medical question of type : frequency <</SYS>> How many people are affected by acute promyelocytic leukemia ? [/INST] Acute promyelocytic leukemia accounts for about 10 percent of acute myeloid leukemia cases. Acute promyelocytic leukemia occurs in approximately 1 in 250,000 people in the United States. </s>