<unk>  is the general name for a family of at least eight genetically separate neurodegenerative lysosomal storage diseases that result from excessive accumulation of lipopigments (lipofuscin) in the body's tissues. These lipopigments are made up of fats and proteins. Their name comes from the word stem "lipo-", which is a variation on lipid, and from the term "pigment", used because the substances take on a greenish-yellow color when viewed under an ultraviolet light microscope. These lipofuscin materials build up in<unk>  cells and many organs, including the liver, spleen, myocardium, and kidneys.
Neuronal ceroid lipofuscinosis
Tay–Sachs disease
Pantothenate kinase-associated neurodegeneration
Infantile neuronal ceroid lipofuscinosis
Glycogen storage disease
Granulovacuolar degeneration
Cerebral creatine deficiency
Familial encephalopathy with neuroserpin inclusion bodies