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

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 I-Ioflupane SPECT image.