Previous studies demonstrated that 11 genes mutation, including TCIRG1, CLCN7, LRP5, IGSF23, OSTM1, CAII, PLEKHM1, TNFSF11, TNFRSF11A, CTSK, IKBKG and ITGB3 are reported to associate with osteopetrosis. This evidence concerns the gene IGSF23 and osteopetrosis.