Mucopolysaccharidosis Type IIIC

**Semantic type:** Disease or Syndrome

**Definition:** A rare autosomal recessive lysosomal storage disease caused by deficiency of the enzyme acetyl-CoA:alpha-glucosaminide acetyltransferase. It is characterized by behavioral changes, sleep disturbances, and mental developmental delays.

**Synonyms:** - MPS III C - Sanfilippo C