Standard classification The<unk> s are generally classified by the nature of the primary stored material involved, and can be broadly broken into the following: (ICD-10 codes are provided where available) * (E75) Lipid storage disorders * Sphingolipidoses, including Gaucher's and Niemann–Pick diseases (E75.0-E75.1) * Gangliosidosis (including Tay–Sachs disease (E75.2) * Leukodystrophies * (E76.0) Mucopolysaccharidoses, including Hunter syndrome and Hurler disease * (E77) Glycoprotein storage disorders * (E77.0-E77.1) Mucolipidoses Also, glycogen storage disease type II (Pompe disease) is a defect in<unk>  metabolism as well, although it is otherwise classified into E74.0 in ICD-10. Cystinosis is an<unk>  characterized by the abnormal accumulation of the amino acid cystine. By type of defect protein Alternatively to the protein targets,<unk> s may be classified by the type of protein that is deficient and is causing buildup. Type of defect protein Disease examples Deficient protein<unk>  enzymes primarily Tay–Sachs disease, I-cell disease, Sphingolipidoses (e.g., Krabbe disease, gangliosidosis: Gaucher, Niemann–Pick disease and glycolipids: Metachromatic leukodystrophy),<unk>  acid lipase deficiency Various Posttranslational modification of enzymes Multiple sulfatase deficiency Multiple sulfatases Membrane transport proteins Mucolipidosis type II and IIIA N-acetylglucosamine-1-phosphate transferase Enzyme protecting proteins Galactosialidosis Cathepsin A Soluble nonenzymatic proteins GM2-AP deficiency, variant AB, Niemann–Pick disease, type C2 GM2-AP, NPC2 Transmembrane proteins SAP deficiency Sphingolipid activator proteins Niemann–Pick disease, type C1 NPC1 Salla disease Sialin Unless else specified in boxes, then the applicable reference is:<unk>  storage disorders<unk> s include: * Sphingolipidoses * Ceramidase * Farber disease * Krabbe disease * Infantile onset * Late onset * Galactosialidosis * Gangliosides: gangliosidoses * Alpha-galactosidase * Fabry disease (alpha-galactosidase A) * Schindler disease (alpha-galactosidase B) * Beta-galactosidase / GM1 gangliosidosis * Infantile * Juvenile * Adult / chronic * GM2 gangliosidosis * AB variant * Activator deficiency * Sandhoff disease * Infantile * Juvenile * Adult onset * Tay–Sachs * Juvenile hexosaminidase A deficiency * Chronic hexosaminidase A deficiency * Glucocerebroside * Gaucher disease * Type I * Type II * Type III * Sphingomyelinase *<unk>  acid lipase deficiency * Early onset * Late onset * Niemann–Pick disease * Type A * Type B * Sulfatidosis * Metachromatic leukodystrophy * Saposin B deficiency * Multiple sulfatase deficiency Mucopolysaccharidoses * Type I * MPS I Hurler syndrome * MPS I S Scheie syndrome * MPS I H-S Hurler–Scheie syndrome * Type II (Hunter syndrome) * Type III (Sanfilippo syndrome) * MPS III A (Type A) * MPS III B (Type B) * MPS III C (Type C) * MPS III D (Type D) * Type IV (Morquio) * MPS IVA (Type A) * MPS IVB (Type B) * Type VI (Maroteaux–Lamy syndrome) * Type VII (Sly syndrome) * Type IX (hyaluronidase deficiency) Mucolipidosis * Type I (sialidosis) * Type II (I-cell disease) * Type III (pseudo-Hurler polydystrophy / phosphotransferase deficiency) * Type IV (mucolipidin 1 deficiency) Lipidoses * Niemann–Pick disease * type C * Type D * Neuronal ceroid lipofuscinoses * Type 1 Santavuori–Haltia disease / infantile NCL (CLN1 PPT1) * Type 2 Jansky–Bielschowsky disease / late infantile NCL (CLN2/LINCL TPP1) * Type 3 Batten–Spielmeyer–Vogt disease / juvenile NCL (CLN3) * Type 4 Kufs disease / adult NCL (CLN4) * Type 5 Finnish Variant / late infantile (CLN5) * Type 6 Late infantile variant (CLN6) * Type 7 CLN7 * Type 8 Northern epilepsy (CLN8) * Type 8 Turkish late infantile (CLN8) * Type 9 German/Serbian late infantile (unknown) * Type 10 Congenital cathepsin D deficiency (CTSD) * Wolman disease Oligosaccharide * Alpha-mannosidosis * Beta-mannosidosis * Aspartylglucosaminuria * Fucosidosis<unk>  transport diseases * Cystinosis * Pycnodysostosis * Salla disease / sialic acid storage disease * Infantile free sialic acid storage disease Glycogen storage diseases * Type II Pompe disease * Type IIb Danon disease Other * Cholesteryl ester storage disease<unk>  disease
Lysosomal storage disease
Glycogen storage disease
Neutral lipid storage disease
Lipid storage disorder
Creatine transporter defect
D-bifunctional protein deficiency
Trinucleotide repeat disorder
Hyaluronidase deficiency