Decoding Huntington's disease: a global survey on symptoms and genetic testing practices

Area of Science:

• Neuroscience
• Genetics
• Clinical Neurology

Background:

• Huntington's disease (HD) is an autosomal dominant neurodegenerative disorder.
• It is caused by a CAG trinucleotide repeat expansion in the HTT gene.
• HD presents with motor, psychiatric, and cognitive symptoms, often before motor onset.

Purpose of the Study:

• To identify clinical symptoms considered pathognomic of Huntington's disease (HD).
• To determine criteria for genetic testing in suspected HD cases.
• To understand expert neurologist and neuro-geneticist perspectives on HD diagnosis.

Main Methods:

• An online survey was distributed to 130 neurologists and neuro-geneticists.
• 52 specialists from the European Huntington's Disease Network (EHDN) responded.
• Responses were analyzed using Microsoft Excel and SPSS 26.

Main Results:

• Chorea, cognitive slowing, irritability, and gait abnormalities were universally identified as indicative of HD.
• Neuropathy, limb weakness, and tremor were considered inconsistent with HD.
• 19% of experts would test with ancillary symptoms if a primary HD symptom was present; chorea alone sufficed without family history.

Conclusions:

• HD diagnosis is complex, requiring attention to subtle psychiatric and cognitive symptoms.
• Comprehensive patient counseling and clinical vigilance are crucial.
• Advances in genetic testing and therapeutics offer hope for HD treatment.