Acute promyelocytic leukemia (APL with t15;17) is a disease characterized by abnormal proliferation of promyelocytic cells in the peripheral blood and bone marrow, along with coagulopathy and thrombocytopenia. It is a variation of AML that frequently exhibits a typical chromosomal translocation. Laboratory analysis and confirmatory testing for the fusion gene make diagnosis and treatment of APL with t(15;17) possible.