A condition associated with mutation(s) in the CLN3 gene, encoding battenin. The condition is one of a group of genetically heterogeneous neurodegenerative disorders, characterized by accumulation of intracellular lipopigments. The disease is MONDO_0008767 (neuronal ceroid lipofuscinosis 3). Also known as: CLN3, CLN3 neuronal ceroid lipofuscinosis, Juvenile CLN3 Disease, ceroid lipofuscinosis, neuronal, type 3, neuronal ceroid lipofuscinosis caused by mutation in CLN3, neuronal ceroid lipofuscinosis type 3.