Background
Acute leukemia is the most frequent childhood malignancy and is generally categorized into lymphoid or myeloid leukemias. However, 2-5% of pediatric acute leukemia present with simultaneous lymphoid and myeloid leukemia, diagnosed as mixed phenotype acute leukemia (MPAL). Unfortunately little is known about MPAL and standardized therapy isn't established, which hinders the patients' chance of achieving a disease-free remission.