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We medical folk are simple people, and a famous writer in the E.R., like a case of Sydenham’s chorea or an interestingly shaped object lodged in a rectum, excites our general interest.

It looked like they were displaying Sydenham's chorea, with involuntary arm and hand movements.

In the 1990s Susan Swedo at the National Institute of Mental Health was studying Sydenham's chorea and she made a link between it and OCD.

Sydenham’s Chorea and Tourette’s Is there a correlation between Sydenham’s chorea and Tourette’s?

Such cases probably fall on a continuum with Sydenham’s chorea and other post-infectious disorders that can lead to an inflammation in the basal ganglia, a part of the brain involved in motor control and learning.