Figure 4.

57-year-old female with ischiofemoral impingement. CT scout view (A) and axial CT images through the lesser trochanter during a steroid injection demonstrate asymmetric narrowing of the right ischiofemoral and quadratus femoris spaces (B) and placement of a 10cm-long 22-gauge spinal needle through the proximal hamstring tendons (straight arrow), into the ischiofemoral space (C). In the prone position, both hips were externally rotated, slightly more on the right side. Oval indicates sciatic nerve. QF = quadratus femoris.