SLC20A2 and bilateral striopallidodentate calcinosis: A systematic review from 2012 (when genes for PFBC were discovered) to November 2016 collected 137 cases, of which 34 were familial, and showed that SLC20A2 was the most common gene involved in 75 out of 137 cases (54.7%), followed by PDGFB (43 cases—31.4%) and PDGFRB (13 cases—9.5%).