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20 Diseases You've Probably Never Heard Of

20

Segawa Syndrome

Like some other rare diseases, Segawa Syndrome is genetic.
Like some other rare diseases, Segawa Syndrome is genetic.
©iStockphoto.com/Kyu Oh

This rare genetic disorder is characterized by an uncoordinated or clumsy manner of walking and dystonia (a general term for a group of muscle disorders characterized by involuntary contractions). Symptoms usually become apparent around six years of age and may be more noticeable in the afternoon or evening than in the morning.

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