Case Report

Agenesis of the piriformis muscle: A case report with review of literature

Pankaj Nepal, Syed I. Alam, Sadia Sajid, Syeda S. Intakhab, Vijayanadh Ojili
South African Journal of Radiology | Vol 24, No 1 | a1838 | DOI: https://doi.org/10.4102/sajr.v24i1.1838 | © 2020 Pankaj Nepal, Syed I. Alam, Sadia Sajid, Syeda S. Intakhab, Vijayanadh Ojili | This work is licensed under CC Attribution 4.0
Submitted: 16 December 2019 | Published: 16 April 2020

About the author(s)

Pankaj Nepal, Department of Radiology, St. Vincent’s Medical Center, Bridgeport, United States
Syed I. Alam, Department of Clinical Imaging, Hamad Medical Corporation, Doha, Qatar
Sadia Sajid, Department of Clinical Imaging, Hamad Medical Corporation, Doha, Qatar
Syeda S. Intakhab, awaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India
Vijayanadh Ojili, Department of Radiology, University of Texas Health, San Antonio, United States

Abstract

Agenesis of the piriformis muscle is an extremely rare occurrence. Knowledge about this anatomic variant is important because of its close proximity with the sciatic nerve and sacral plexus. The piriformis muscle also serves as an important anatomic landmark for image-guided intervention and hip surgery. We report a case of piriformis muscle agenesis in a 28-year-old woman, incidentally detected on magnetic resonance imaging of the lumbosacral spine and pelvis, performed for low back pain.

Keywords

piriformis muscle; agenesis; MRI; orthopaedics; lower back pain.

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