A 57-year-old female complains of pain and numbness in the left anterolateral thigh for 9 months. This followed surgery for hip replacement via an anterior approach. The pain is worse with touch, walking, going upstairs, downstairs, and prolonged standing. It is relieved by standing still and relaxing. The pain fluctuates between 2 and 6 on the VAS depending on her activity. Pregabalin helped some. PMH: migraine, DVT, kidney infections, diabetes, kidney stones, arthritis, and pancreatitis. PSH: two tubal pregnancies, tubal ligation, left total hip replacement, cervical fusion, and hemithyroidectomy. FH: positive for lymphoma in her father, stomach cancer in her paternal grandfather, breast cancer in her paternal grandmother, leukemia in her maternal grandmother, and diabetes in her mother. On examination, the area of diminished sensation is depicted in Fig. 13.1. The arrows point to the hip incision, which is tender to palpation. Otherwise motor examination and reflexes are normal.