PLA2G6 and neurodegeneration with brain iron accumulation 2B: PLA2G6-associated disease is a continuum of three distinct, yet overlapping phenotypes [6,10]: classic infantile neuroaxonal dystrophy (INAD) (MIM#256600), atypical neuroaxonal dystrophy (NAD) of childhood-onset (MIM#610217) and PLA2G6-related dystonia-parkinsonism with onset in adulthood (MIM#612953) [1,6].