SLC20A2 and bilateral striopallidodentate calcinosis: At least 40 % of the cases of PFBC are linked to deleterious mutations in the gene SLC20A2, which encodes the type III Na+-dependent inorganic phosphate (NaPi) symporter PiT2 [1–3], and recently, also a de novo mutation in SLC20A2 was identified in a patient presenting with brain calcifications [4].