Dysequilibrium syndrome

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(Redirected from DES)

Alternate names DES; Cerebellar hypoplasia, VLDLR associated; VLDLRCH

Definition Dysequilibrium syndrome (DES) is a non-progressive cerebellar disorder characterized by ataxia associated with an intellectual disability, delayed ambulation and cerebellar hypoplasia.

Epidemiology[edit | edit source]

To date, more than 50 individuals have been reported in the world literature.

Cause[edit | edit source]

  • Etiological subtypes of DES have been reported and include type 1 (CAMRQ1), 2 (CAMRQ2), 3 (CAMRQ3) and 4 (CAMRQ4) which are attributed to mutations in VLDLR (9p24), CA8 (8q12.1), WDR81 (17p13.3) and ATP8A2 (13q12) genes, respectively.
  • VLDLR encodes the very low density lipoprotein receptor (VLDLR) which is involved in neuronal migration in the cerebral cortex and cerebellum. CA8 encodes a carbonic-anhydrase related protein, whose biological function is not yet fully understood.
  • The function of WDR81 is still unknown.
  • ATP8A2 encodes an ATPase which is mainly expressed in brain tissue, with the highest levels found in the cerebellum, and that may be critical for the developmental processes of the central nervous system.

Inheritance[edit | edit source]

Autosomal recessive inheritance, a 25% chance

Transmission is autosomal recessive. Genetic counseling should be offered to at-risk couples (both individuals are carriers of a disease-causing mutation) informing them of the 25% chance of having an affected child.

Signs and symptoms[edit | edit source]

Clinical presentation[edit | edit source]

For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed.

80%-99% of people have these symptoms

30%-79% of people have these symptoms

5%-29% of people have these symptoms

  • Abnormality of vision(Abnormality of sight)
  • Cataract(Clouding of the lens of the eye)

Diagnosis[edit | edit source]

Treatment[edit | edit source]

NIH genetic and rare disease info[edit source]

Dysequilibrium syndrome is a rare disease.


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Contributors: Deepika vegiraju, Dr.T