PML and acute promyelocytic leukemia: Based on the patient's clinical manifestations and laboratory test results, particularly fluorescent polymerase chain reaction (PCR) capillary electrophoresis fragment analysis and quantitative real-time PCR results indicating positive L- and S-isoform PML::RARA fusion transcripts, the patient was diagnosed with low-risk APL characterized by L- and S-isoform PML::RARA fusion transcripts (Figure 1).