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词条 HIDEA syndrome
释义

  1. Genetics

  2. Epidemiology

  3. Clinical features

  4. Diagnosis

  5. Management

  6. History

  7. References

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| name = HIDEA syndrome
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| caption = HIDEA syndrome is inherited via an autosomal recessive manner
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| causes = Mutation in P4HTM gene
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}}HIDEA syndrome is a syndrome characterised by hypotonia, intellectual disability and eye abnormalities.[1]

Genetics

This condition is caused by mutations in the Prolyl 4-hydroxylase, transmembrane (P4HTM) gene. This gene is located on the short arm arm of chromosome 3 (3p21.3).

The inheritance of this condition is autosomal recessive.

Epidemiology

The prevalence is not known but this is considered to be a rare disease. Only 12 patients have been reported to date.

Clinical features

This syndrome main causes intellectual disability and affects the eyes, musculoskeletal system and face.

Eyes
  • Strabismus
  • Difficulty fixing the eyes on an object
Face

Facial features gradually become coarser during childhood

Musculoskeletal system
  • Hypotonia
  • Planovalgus
  • Contractures in elbow joints
  • Interphalangeal joint hypermobility

Other associated features include hypoventilation, obstructive and central sleep apnea and dysautonomia.

Diagnosis

The diagnosis may be suspected on clinical grounds.

It is made by sequencing the P4HTM gene.

Management

There is presently no curative treatment. Management is supportive.

History

This condition was first described in 2014.[2] The causative mutation was discovered in 2019.[3]

References

1. ^Kaasinen E, Rahikkala E, Koivunen P, Miettinen S, Wamelink MM, Aavikko M, Palin K, Myllyharju J, Moilanen JS, Pajunen L, Karhu A, Aaltonen LA (2019) Clinical characterization, genetic mapping and whole-genome sequence analysis of a novel autosomal recessive intellectual disability syndrome. Eur J Med Genet 57(10):543-551
2. ^Kaasinen E, Rahikkala E, Koivunen P, Miettinen S, Wamelink MM, Aavikko M, Palin K, Myllyharju J, Moilanen JS, Pajunen L, Karhu A, Aaltonen LA (2019) Clinical characterization, genetic mapping and whole-genome sequence analysis of a novel autosomal recessive intellectual disability syndrome. Eur J Med Genet 57(10):543-551
3. ^Rahikkala E, Myllykoski M, Hinttala R, Vieira P, Nayebzadeh N, Weiss S, Plomp A, Bittner RE, Kurki MI, Kuismin O, Lewis AM, Väisänen ML, Kokkonen H, Westermann J, Bernert G, Tuominen H, Palotie A, Aaltonen L, Yang Y, Potocki L, Moilanen J, van Koningsbruggen S, Wang X, Schmidt WM, Koivunen P, Uusimaa J (2019) Biallelic loss-of-function P4HTM gene variants cause hypotonia, hypoventilation, intellectual disability, dysautonomia, epilepsy, and eye abnormalities (HIDEA syndrome). Genet Med
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2 : Genetic diseases and disorders|Rare syndromes

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