Bipartite piriformis muscle: an unusual cause of sciatic nerve entrapment.
The sciatic nerve usually emerges below the piriformis muscle; however, variations of the relationship between the sciatic nerve and piriformis muscle are occasionally encountered. In a 28-year-old woman with sciatica, entrapment of the sciatic nerve by a bipartite piriformis muscle was found. She was treated by dissection of the lower head of the piriformis muscle and restitution of the normal anatomical relationship between the nerve and piriformis muscle. Sciatica resolved postoperatively.
Wun-Schen
Chen
C
Department of Orthopedic Surgery, Chang-Gung Medical College and Chang-Gung Memorial Hospital Kaohsiung Medical Center, KaohsiungTaiwan.
D000328:Adult; D005260:Female; D006801:Humans; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging / Q000473:pathology*; D009408:Nerve Compression Syndromes / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D012584:Sciatic Nerve / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D012585:Sciatica / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed