Since then, six genes have been definitively linked with PFBC: four inherited in an autosomal dominant manner (SLC20A2, PDGFB, PDGFRB, and XPR1) and two displaying an autosomal recessive inheritance (MYORG and JAM2) [13,14,15,16,17]. The gene discussed is XPR1; the disease is bilateral striopallidodentate calcinosis.