investigation and diagnosis

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  • plain radiographs will not assist in the diagnosis of piriformis syndrome (PS)

  • Electromyograms (EMGs) may reveal abnormalities in the tibial and peroneal divisions of the sciatic nerve

  • CT and MRI can help differentiate PS from other possible causes of sciatica and can be used to directly determine the diagnosis of PS by revealing an enlarged piriformis muscle

Last reviewed 10/2020