Symptoms of Angelman syndrome


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General information about symptoms of Angelman syndrome: The symptom information on this page attempts to provide a list of some possible symptoms of Angelman syndrome. This symptom information has been gathered from various sources, may not be fully accurate, and may not be the full list of symptoms of Angelman syndrome. Furthermore, symptoms of Angelman syndrome may vary on an individual basis for each patient. Only your doctor can provide adequate diagnosis of symptoms and whether they are indeed symptoms of Angelman syndrome.

List of symptoms of Angelman syndrome: The list of symptoms mentioned in various sources for Angelman syndrome includes:

Symptoms of Angelman syndrome: Angelman syndrome is a neurological disorder characterized by severe congenital mental retardation, unusual facial appearance, and muscular abnormalities. Symptoms of Angelman syndrome include unstable jerky gait, hand flapping, unusually happy demeanor, developmental delay, lack of or diminished speech, and microcephaly (small head). Epilepsy may develop in the early years of life, however it may decrease with age. Patients may also have balance problems. 1

Symptom statistics for Angelman syndrome: The following are statistics from various sources about the symptoms of Angelman syndrome:

  • 100% of people with Angelman Syndrome have functionally severe developmental delay in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 100% of people with Angelman Syndrome have speech impairment in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 100% of people with Angelman Syndrome have movement or balance disorder, usually ataxia of gait and/or tremulous movement of limbs in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 100% of people with Angelman Syndrome have behavioural uniqueness such as frequent laughter/smiling, apparent happy demeanour, easily excitable personality often with hand flapping movements, hyper motoric behaviour and short attention span in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 80% of people with Angelman Syndrome have a delayed or disproportionate head circumference growth in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 80% of people with Angelman Syndrome have seizures which usually start before the age of 3 in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 80% of people with Angelman Syndrome have abnormal EEG’s in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome have a flat area at the back of the head in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome have a groove at the back of the head in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome have a protruding tongue in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome exhibit tongue thrusting with sucking or swallowing disorders in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome have a feeding problems while infants in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome have a projecting jaw in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome have a wide mouth with spread out teeth in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome drool frequently in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome chew or mouth excessively in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome have strabisumsin the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome have hypopigmented skin in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome have a hyperactive lower limb deep tendon reflexes in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome are sensitive to heat in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome suffer sleep disturbances in the US (Dr Harry Angelman, Angelman Syndrome Foundation)
  • 20-80% of people with Angelman Syndrome are fascinated by water in the US (Dr Harry Angelman, Angelman Syndrome Foundation)

More symptoms of Angelman syndrome: In addition to the above information, to get a full picture of the possible symptoms of this condition and its related conditions, it may be necessary to examine symptoms that may be caused by complications of Angelman syndrome, underlying causes of Angelman syndrome, associated conditions for Angelman syndrome, risk factors for Angelman syndrome, or other related conditions.

Medical articles on symptoms: These general reference articles may be of interest:



Footnotes:
1. excerpt from NINDS Angelman Syndrome Information Page: NINDS

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