The<unk>  are caused by a deficiency of beta-galactosidase, with resulting abnormal storage of acidic lipid materials in cells of the central and peripheral nervous systems, but particularly in the nerve cells.<unk>  has three forms:  early infantile, late infantile, and adult.
GM1 gangliosidoses
Sphingolipidoses
Glycogen storage disease type XI
Glycogen storage disease type V
Glycogen storage disease type VI
Glycogen storage disease type I CT
Glycogen storage disease type I
Glycogen storage disease type VII