PRKN and Lewy body dementia: Second, a few compound heterozygote parkin mutation cases (e.g., Farrer et al., 2010) and some clearly simple heterozygous parkin and some, at least, PINK1 cases have been reported to have typical Lewy body disease suggesting that the pathogeneses of the two forms of the disease are not dissimilar (Samaranch et al., 2010).