SLC20A2 and bilateral striopallidodentate calcinosis: To date, at least six causative genes have been identified, including the SLC20A2 gene, PDGFRB gene, PDGFB gene, XPR1 gene, MYORG gene, and JAM2 gene, among which mutations in the SLC20A2 gene account for approximately 61% of PFBC cases [1].