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Syndrome reference sheet
Generated 13 Oct 2026
Neurology · Neurology / Metabolic disease

Mucopolysaccharidosis type III

Also known as: Sanfilippo syndrome

Heparan sulfate storage with prominent neurodegeneration.

Medical specialty
Neurology
Subspecialty
Neurology / Metabolic disease
Sex & age distribution
Male: affected; Female: affected equally; Children: yes, early childhood
Gene(s) involved
GNS, HGSNAT, NAGLU, SGSH

Etiology & mechanism

SGSH, NAGLU, HGSNAT, GNS mutations.

Gene(s) involved (4)

GNSHGSNATNAGLUSGSH

Symptoms & signs (3)

hyperactivityregressionsleep disturbance
SyndromeScope — educational reference. Content is model-generated and not clinically verified; always confirm against OMIM, Orphanet and GeneReviews before clinical use.