48, XXYY syndrome associated tremor
Hazel Lote1, Geraint N Fuller, Peter G Bain
1Department of Neurosciences, Imperial College London, Charing Cross Hospital Campus, London, UK.
Practical Neurology
|March 15, 2013
Summary
48, XXYY syndrome, a sex chromosome aneuploidy, affects males and presents with tall stature and infertility, similar to Klinefelter syndrome. It also commonly involves dental issues, tremor, and learning difficulties, with tremors worsening with age.
Area of Science:
- Genetics
- Endocrinology
- Neurology
Background:
- 48, XXYY syndrome is a rare sex chromosome aneuploidy affecting males, with an incidence ranging from 1 in 18,000 to 1 in 40,000.
- The condition is diagnosed via karyotyping and is not inherited.
- It shares some clinical features with 47, XXY Klinefelter syndrome, including tall stature, micro-orchidism, hypergonadotropic hypogonadism, and male infertility.
Observation:
- Patients with 48, XXYY syndrome frequently exhibit distinct characteristics beyond those seen in Klinefelter syndrome.
- Commonly observed issues include dental anomalies, intention tremors, attention deficit disorder, learning difficulties, and allergic conditions such as asthma.
- A significant percentage (71%) of adult patients over 20 years old with 48, XXYY syndrome report intention tremors.
Findings:
- The incidence of intention tremors in 48, XXYY syndrome increases with age.
- Tremors associated with this condition tend to progressively worsen over time.
- The syndrome presents a complex interplay of genetic, physical, and neurodevelopmental challenges.
Implications:
- Understanding the unique features of 48, XXYY syndrome is crucial for accurate diagnosis and management.
- Early identification of associated conditions like learning difficulties and tremors can lead to timely interventions.
- Further research into the pathophysiology of 48, XXYY syndrome may reveal novel therapeutic targets for associated symptoms.
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