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A Rare but Treatable Cause of Paroxysmal Nonkinesigenic Choreoathetosis

Paroxysmal dyskinesias are a heterogeneous group of movement disorders characterized by episodic recurrent abnormal involuntary movements. Phenomenology of the movements can range from chorea, athetosis, ballism, dystonia in isolation or in combination.[1] They are classified as paroxysmal kinesigenic choreoathetosis (PKC), paroxysmal nonkinesigenic choreoathetosis (PNKD), and paroxysmal exercise-induced dyskinesia (PED) depending on the trigger and can be inherited or secondary. Secondary causes include trauma, stroke, meningovascular syphilis, encephalitis, multiple sclerosis, and metabolic disorders such as diabetes, hypoparathyroidism, hyperparathyroidism, and kernicterus.[2] We describe a young patient with secondary PNKD with some peculiarities.