123I-FP-CIT SPECT and MRI Findings in a Patient With Parkinsonism After Fenpyroximate Intoxication

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Fenpyroximate is a widely used acaricide. Its main action is to inhibit the mitochondrial respiratory chain. Chronic exposure to fenpyroximate is associated with dopaminergic cell loss and parkinsonism; however, to date, there has not been a reported case of parkinsonism as a result of acute fenpyroximate intoxication. Here, we report a 58-year-old man who developed parkinsonism after deliberate fenpyroximate intoxication, but with normal presynaptic 123I-Ioflupane SPECT image.

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