FUS and essential thrombocythemia: FUS is an RNA‐binding protein whose genetic mutations or pathological inclusions are currently associated with multiple neurological diseases including ALS (Vance et al., 2009), frontotemporal lobar degeneration (FTLD; Cairns & Ghoshal, 2010), and essential tremor (ET; Merner et al., 2012), although the results of ET in most confirmatory studies are negative (Zheng et al., 2013).