NEURONAL CEROID LIPOFUSCINOSES 6 PRESENTING AS EARLY ONSET PARKINSONISM Leuzzi V 1 , Garavaglia B 2 , Vitali V 1 , Nardocci N 2 , Manti F 1 1 Dep Dev Neur Psyc Univ Sapienza, Rome, Italy 2 IRRCCS C Besta Neur Inst Found, Milan, Italy