Orphanet: Sialidosis type 1

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Sialidosis type 1

Disease definition

Sialidosis type 1 (ST-1) is a very rare lysosomal storage disease, and is the normosomatic form of sialidosis (see this term), characterized by gait abnormalities, progressive visual loss, bilateral macular cherry red spots and myoclonic epilepsy and ataxia, that usually presents in the second to third decade of life.


Classification level: Disorder
  • Synonym(s):
    • Cherry-red spot-myoclonus syndrome
    • Lipomucopolysaccharidosis
    • Normomorphic sialidosis
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Childhood, Adolescent
  • ICD-10: E77.1
  • OMIM: 256550
  • UMLS: C0023806  C0268226  C1850510
  • MeSH: -
  • GARD: 7639
  • MedDRA: -

Detailed information


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