2021 Volume 12 Issue 6 Pages 894-897
Introduction: Entrapment neuropathy of the middle cluneal nerves (MCNs) is not commonly recognized, but it might be a cause of lower back pain.
Case Report: A 61-year old woman complained of right buttock pain that had developed gradually over 5 months. Neurological examination showed no sensory or motor disturbance in her legs, but Tinel's sign and tenderness were present in her right buttock. The patient's clinical symptom was persistently unresponsive to conservative treatment. Therefore, surgical release of the right MCN was performed under local anesthesia. Just after the operation, the patient reported that her pain around the right buttock had completely disappeared.
Conclusion: Intraoperatively, intermuscular dissection between the iliocostalis and the longissimus was useful to find the MCN squeezed by the posterior sacroiliac ligament.