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

Pankaj Nepal, Syed I. Alam, Sadia Sajid, Syeda S. Intakhab, Vijayanadh Ojili

Research output: Contribution to journalReview articlepeer-review


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.

Original languageEnglish (US)
Article numbera1838
JournalSouth African Journal of Radiology
Issue number1
StatePublished - 2020


  • MRI
  • agenesis
  • lower back pain
  • orthopaedics
  • piriformis muscle

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging


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