<unk>  <unk>  are a group of inherited metabolic diseases that affect the body’s ability to carry out the normal turnover of various materials within cells. In<unk> , abnormal amounts of carbohydrates or fatty materials (lipids) accumulate in cells. Because our cells are not able to handle such large amounts of these substances, damage to the cells occurs, causing symptoms that range from mild learning disabilities to severe mental retardation and skeletal deformities. Symptoms of<unk>  can be congenital (present at birth) or begin in early childhood or adolescence. Early symptoms can include vision problems and developmental delays. Over time, many children with<unk>  develop poor mental capacities, have difficulty reaching normal developmental milestones, and, in many cases, eventually die of the disease.
Mucolipidosis
Sphingolipidoses
GM1 gangliosidoses
Mucopolysaccharidosis
Glycogen storage disease type VI
Glycogen storage disease type XI
Glycogen storage disease type IV
Glycogen storage disease type V