J Korean Hip Soc.  2008 Dec;20(4):326-329. 10.5371/jkhs.2008.20.4.326.

Arthroscopic Treatment of Secondary Piriformis Syndrome by Perineural Cyst on the Sciatic Nerve: A Case Report

• Kang C
• Hwang DS
• Cha SM

• KMID: 2162619
• DOI: http://doi.org/10.5371/jkhs.2008.20.4.326

Abstract

Secondary piriformis syndrome may develop under several conditions. We report on the method and usefulness of arthroscopic treatment of the piriformis muscle and benign perineural cyst of the sciatic nerve. Arthroscopic assessment was performed to a perineural cyst on the sciatic nerve seen through EMG and hip MRI. Through the posterior and posteroinferior portal, the lesion below the piriformis muscle was confirmed following release of the tendon. The incision and drainage of the perineural cyst was done so as to achieve decompression. The excision of the lesion was not carried out so as to avoid injury to the sciatic nerve. Symptoms did not recur during 10 months of follow up appointments.

Keyword

Piriformis syndrome; Sciatic nerve; Perineural cyst; Arthroscopic treatment

MeSH Terms

Appointments and Schedules
Decompression
Drainage
Follow-Up Studies
Hip
Muscles
Piriformis Muscle Syndrome
Sciatic Nerve
Tarlov Cysts