PANK1 and Huntington disease-like 2: Chorea-acanthocytosis (ChAc, OMIM 200150) occupies the main entity of this disease group which also includes McLeod syndrome (MLS), Huntington’s disease-like 2 (HDL2) and, more rarely, pantothenate kinase-associated neurodegeneration (PKAN) (Walker et al., 2011).