SMARCB1 and schwannomatosis: It has been shown that 48% of familial and 9.8% of sporadic patients with schwannomatosis exhibit germline SMARCB1 mutations (Boyd et al., 2008; Hadfield et al., 2008; Hulsebos et al., 2007; Rousseau, Noguchi, Bourdon, Sobol, & Olschwang, 2011; Sestini, Bacci, Provenzano, Genuardi, & Papi, 2008; Smith, Wallace, Bowers, Eaton, & Evans, 2014; Smith et al., 2012).