Gerstmann–Sträussler–Scheinker syndrome (GSS) is an extremely rare, usually familial, fatal neurodegenerative disease that affects patients from 20 to 60 years in age. It is exclusively heritable, and is found in only a few families all over the world. It is, however, classified with the transmissible spongiform encephalopathies (TSE) due to the causative role played by PRNP, the human prion protein. GSS was first reported by the Austrian physicians Josef Gerstmann, Ernst Sträussler and Ilya Scheinker in 1936.
Familial cases are associated with autosomal-dominant inheritance.
Certain symptoms are common to GSS, such as progressive ataxia, pyramidal signs, and even adult-onset dementia; they progress more as the disease progresses.
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