Neuronal ceroid lipofuscinosis

Neuronal ceroid lipofuscinosis (NCL) is a group of severe neurodegenerative lysosomal storage diseases characterized by intracellular accumulation of ceroid lipofuscin in neurons. NCLs share similar symptoms and signs such as retinopathy, epilepsy, and dementia. Historically, the NCLs were classified by age of disease onset as congenital NCL, infantile NCL (INCL), late infantile NCL (LINCL), juvenile NCL (JNCL) or adult NCL (ANCL). The presently used nomenclature is based on the genetic findings and divides the NCLs into thirteen forms, CLN1-CLN13.