Next-generation sequencing of genes associated with glycogen storage diseases was requested (AGL, ADLDOA, ALDOB, ENO3, EMP2A, FBP1, G9PC, GAA, GBE1, GYG1, GYS1, LAMP2, LDHA, NHLRC1, PFKM, PGAM2, PGK1, PGM1, PHKA2, PHKB, PHKG2, PRKAG2, PYGL, PYGM, SLC2A2, and SLC37A4). This evidence concerns the gene PHKG2 and Glycogen storage disease due to glycogenin deficiency.