PLA2G6 and neurodegeneration with brain iron accumulation 2B: Neurodegeneration associated with PLA2G6 mutations (PLAN) constitutes a heterogeneous group of clinical entities which encompasses infantile neuroaxonal dystrophy (INAD1/NBIA2A, MIM # 256600), atypical neuroaxonal dystrophy (NAD), idiopathic neurodegeneration with brain iron accumulation including Karak syndrome (NBIA2B, # MIM 610217) [1-9] and the recently reported syndrome of adult-onset dystonia-Parkinsonism (PARK 14, MIM # 612953) [9].