Arthroscopic treatment of piriformis syndrome by perineural cyst on the sciatic nerve: a case report
Related Experiment Video
Updated: Jun 17, 2026

Arthroscopic Excision of Posterior Cruciate Ligament Cysts Using a Double Posteromedial Approach
Published on: October 20, 2023
Deuk-Soo Hwang1, Chan Kang, Jung-Bum Lee
1Department of Orthopaedic Surgery, Chungnam National University School of Medicine, 33 Munhwa-ro, Jung-gu, Daejeon 301-721, Korea. dshwang@cnu.ac.kr
Abstract:
This is a case report of an arthroscopic treatment performed on a patient with piriformis syndrome due to perineural cyst on piriformis muscle and sciatic nerve. Confirmation, incision, and drainage of benign cystic lesion on the sciatic nerve below the piriformis muscle were performed following the release of the piriformis tendon through the posterior and posteroinferior arthroscopic portal. Recurrence of the symptoms has not been observed since postoperative period of 20 months. Nor did the MRI taken after the procedure reveal any such recurrence.