Fig. 3
From: Neurolymphomatosis of the lumbosacral plexus and its branches: case series and literature review
Case 3. 67 years old woman. Ultrasound of the distal thigh/popliteal fossa. a Long axis image with convex probe demonstrating a hypoechoic elongated oval-shaped longitudinally oriented mass (arrow). This corresponded to the course of the sciatic nerve. b and c Short axis view of the same lesion with high resolution 12 MHz linear probe without and with probe compression, confirming the presence of a non-compressible hypoechoic lesion (arrows), adjacent to the popliteal artery (a) and vein (v). Note the partial collapse of the popliteal vein (v) in (c)