PANK2 and aceruloplasminemia: NBIA (neurodegeneration with brain iron accumulation) diseases [e.g., aceruloplasminemia, neuroferittinopathy, and PKAN (pantothenate kinase-associated neurodegeneration) 2] result in iron accumulation in the globus pallidus together with an additional gray matter structure(s) (Schneider et al., 2013).