Ultrasound-Guided Popliteal Nerve Block in a Patient with Malignant Degeneration of Neurofibromatosis 1

Figure 2

Ultrasound image with doppler flow analysis of popliteal fossa including the sciatic nerve with intraneural neurofibroma and popliteal artery. Doppler analysis correctly identifies blood flow in the popliteal artery and lack of flow in the intraneural inclusion of the sciatic nerve.