OCAD MSK

History

Bilateral sciatica

Figure 1 for case Bilateral accessory piriformis muscles — Figure 1

Figure 2 for case Bilateral accessory piriformis muscles — Figure 2

Figure 3 for case Bilateral accessory piriformis muscles — Figure 3

Figure 4 for case Bilateral accessory piriformis muscles — Figure 4

Discussion

Bilateral accessory piriformis muscles at the S2 level attaching to the sacral body, anterior the S2 nerve roots. Normal piriformis muscles should be posterior to the sacral nerve roots. The result is that the S2 nerve roots may be pinched between the piriformis and accessory piriformis muscles.

Diagnosis

Bilateral accessory piriformis muscles

Wilson Chang, MD PhD

Courtesy

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