Fig. 5
From: The value of magnetic resonance neurography in evaluation of sciatic neuropathy
A 24-year-old female patient, having a history of intermittent left lower limb pain and cramps. Electrophysiological studies revealed prolonged F wave latency, with + ve ipsilateral straight leg raising test; MRI of the pelvis shows a relatively reduced left gluteus maximum muscle bulk (marks in B) and left sciatic nerve arrowed in (A). MRN shows high signals in the fore-mentioned muscle as well and high bifurcation of the left sciatic nerve at the upper border of left piriformis muscle with relatively increased thickness and signal intensity (C–F), denoting a left piriformis syndrome