ICD-11 definition : Mucopolysaccharidosis type III (MPS III) is a lysosomal storage disease belonging
to the group of mucopolysaccharidoses and characterised by severe and rapid intellectual
deterioration. Deficiencies in one of the four enzymes required for heparan sulphate
degradation are responsible for each of the MPS III subtypes: heparan sulfamidase
for MPS IIIA, alpha-N-acetylglucosaminidase for MPS IIIB, alpha-glucosaminide N-acetyltransferase
for MPS IIIC, and N-acetylglucosamine-6-sulfate sulfatase for MPS IIID.;
Mucopolysaccharidosis type III (MPS III) is a lysosomal storage disease belonging
to the group of mucopolysaccharidoses and characterised by severe and rapid intellectual
deterioration. Deficiencies in one of the four enzymes required for heparan sulphate
degradation are responsible for each of the MPS III subtypes: heparan sulfamidase
for MPS IIIA, alpha-N-acetylglucosaminidase for MPS IIIB, alpha-glucosaminide N-acetyltransferase
for MPS IIIC, and N-acetylglucosamine-6-sulfate sulfatase for MPS IIID.