Ataxia–telangiectasia (AT or A–T), also referred to as ataxia–telangiectasia syndrome or Louis-Bar syndrome, is a rare, neurodegenerative disease causing severe disability. Ataxia refers to poor coordination and telangiectasia to small dilated blood vessels, both of which are hallmarks of the disease.
Ataxia–telangiectasia (AT or A–T), also referred to as ataxia–telangiectasia syndrome or Louis-Bar syndrome, is a rare, neurodegenerative disease causing severe disability. Ataxia refers to poor coordination and telangiectasia to small dilated blood vessels, both of which are hallmarks of the disease.
Source: Wikipedia "Ataxia–telangiectasia" · CC BY-SA 4.0
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