Sciatic Nerve Variants and the Piriformis Muscle: A Systematic Review and Meta-Analysis.
Τίτλος | Sciatic Nerve Variants and the Piriformis Muscle: A Systematic Review and Meta-Analysis. |
Publication Type | Journal Article |
Year of Publication | 2020 |
Authors | Poutoglidou, F., Piagkou M., Totlis T., Tzika M., & Natsis K. |
Journal | Cureus |
Volume | 12 |
Issue | 11 |
Pagination | e11531 |
Date Published | 2020 Nov 17 |
ISSN | 2168-8184 |
Abstract | The present systematic review and meta-analysis provides a comprehensive assessment of the sciatic nerve (SN) variants relative to the piriformis muscle (PM) and compares those variants' prevalence among different geographical populations with respect to gender and laterality. A database search was conducted to identify cadaveric studies pertinent to SN variants relative to the PM. A total of 44 articles were included. The typical morphological pattern (type A, with the SN passing undivided below the PM) was found to be the most common variant, with 90% pooled prevalence. SN variants were more common among East Asians, with a 31% pooled prevalence of total variants. No significant differences were established with respect to gender and laterality. In greater than 10% of the population, the SN coursed through or above piriformis. Patients' epidemiological characteristics may predispose them to certain variants. The common peroneal nerve (CPN) is more susceptible to injury during a total hip arthroplasty or a hip arthroscopy where anomalies are encountered. As anatomical variants are commonly associated with piriformis syndrome, they should always be considered during diagnosis and treatment. |
DOI | 10.7759/cureus.11531 |
Alternate Journal | Cureus |
PubMed ID | 33354475 |
PubMed Central ID | PMC7746330 |