A 65-year-old woman was referred by an orthopedist to a rheumatologist for left knee pain. Previously, in 2014, she underwent left total knee arthroplasty (TKA) for severe osteoarthritis in a different institution. Following the procedure, she experienced severe chronic anterolateral knee pain at rest, exacerbated by walking. Because she was rendered wheelchair bound and required…
![Right: The same view as 2A, with the common peroneal nerve outlined in yellow with a cross-sectional area of 21 mm2.](https://www.the-rheumatologist.org/wp-content/uploads/2020/04/THR-0420_pg19c-150x150.png)