Accessory Belly of the Piriformis Muscle as a Cause of Piriformis Syndrome: a Case Report with Magnetic Resonance Imaging and Magnetic Resonance Neurography Imaging Findings
10.13104/imri.2019.23.2.142
- Author:
Hae Jung KIM
1
;
So Yeon LEE
;
Hee Jin PARK
;
Kun Woo KIM
;
Young Tak LEE
Author Information
1. Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea. capella27@gmail.com
- Publication Type:Case Report
- Keywords:
Accessory muscle;
Piriformis muscle;
Piriformis syndrome;
Magnetic resonance imaging;
Magnetic resonance neurography
- MeSH:
Diagnosis;
Electromyography;
Femur;
Magnetic Resonance Imaging;
Needles;
Neural Conduction;
Piriformis Muscle Syndrome
- From:Investigative Magnetic Resonance Imaging
2019;23(2):142-147
- CountryRepublic of Korea
- Language:English
-
Abstract:
Piriformis syndrome caused by an accessory belly of the piriformis muscle is very rare. Only a few cases have been reported. Here, we report a case of piriformis syndrome resulting from an extremely rare type of accessory belly of the piriformis muscle originated at the proximal third portion of the main piriformis muscle and attached separately to the greater trochanter inferior to the insertion of the main piriformis muscle. A definitive diagnosis of piriformis syndrome was made based on magnetic resonance imaging and magnetic resonance neurography findings that were consistent with results of nerve conduction study and needle electromyography.
