The remaining yet unclassified samples were grouped according to recurrent or known BCP-ALL gene fusions: BCL2-IGH (2 patients), EP300-ZNF384 (2 patients) MEF2D-PYGO2 (1 patient), and KMT2A-MLLT3 (1 patient). This evidence concerns the gene PYGO2 and acute lymphoblastic leukemia.