PDGFRB and bilateral striopallidodentate calcinosis: In their recent study, Sanchez-Contreras et al. [18], transfected HeLa cells with different PDGFRB-expressing constructs, two carrying the L658P and R987W mutations [14], and two carrying two novel R695C and A1096V mutations identified in autopsy material stored in a brain bank of sporadic PFBC patients [18].