Figure 33. Radial nerve compression by ganglion. Photograph (bottom) shows the area scanned. US scans in transverse (Tr) and sagittal (Sag) views show an anechoic ganglion (G) compressing the radial nerve (arrowheads) in a 45-year-old woman complaining of a palpable nodule in the anterior cubital fossa, with a positive Tinel sign.