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IJAR.2017.306

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Type of Article:  Case Report

Volume 5; Issue 3.2 (August 2017)

Page No.: 4275-4279

DOI: https://dx.doi.org/10.16965/ijar.2017.306

A RARE CASE OF BILATERAL SUPRA PIRIFORMIS PELVIC EXIT OF COMMON PERONEAL NERVE: SIGNIFICANCE IN PELVIC AND HIP SURGERY

Cheryl-Melovitz Vasan *1, Evan Goldman 2, Lauren Sysol 3, Nagaswami Vasan *4.

*1 Assistant Professor, Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, New Jersey, USA.

2 Evan Goldman, Assistant Professor, Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, New Jersey, USA.

3 Lauren Sysol, Anatomy Lab Technical Staff Member, Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, New Jersey, USA.

*4 Professor, Department of Biomedical Sciences, Copper Medical School of Rowan University, Camden, New Jersey 08103, USA.

Address for Correspondence: Prof. Dr. Nagaswami Vasan, D.V.M., M.V.Sc., Ph.D., Professor of Anatomy, Department of Biomedical Sciences, Cooper Medical School of Rowan University, 401 South Broadway, Camden, New Jersey 08103, USA. Phone: +1 (856) 361-2890 E-Mail: vasan@rowan.edu

ABSTRACT

Background: The tibial and common peroneal nerves unite to form the sciatic nerve, which may exit the pelvis in several different ways. Much of these differences involve the nerves relationship to the piriformis muscle.

Materials and Methods: We report here an anomaly found in a 70-year old Caucasian female who died of congestive heart failure and donated her body to the willed body program. As part of the cadaveric dissection of the donor, the medical students observed a variation in the pelvic exit of the common peroneal nerve.

Results and observations: Upon detailed dissection of the gluteal and pelvic region, we observed that bilaterally the common peroneal nerve exited the pelvis superolaterally and the tibial nerve exited inferomedially to the piriformis muscle. Intra- pelvic dissection further showed, that from the beginning, the two components of the sciatic nerve maintained an independent course.

Conclusions: The common peroneal and the tibial nerves, which unite to form the sciatic nerve normally, exit the pelvis inferior to the piriformis muscle. However, we observed an anomaly in the formation and exit of the two components of the sciatic nerve. The superolateral exit of the common peroneal nerve, especially, is a serious variation that is relevant in hip and pelvic surgery.

Key words: Common peroneal nerve, tibial nerve, sciatic nerve, piriformis, hip replacement surgery, pelvic surgery, patient risk.

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Cite this article: Cheryl-Melovitz Vasan, Evan Goldman, Lauren Sysol, Nagaswami Vasan. A RARE CASE OF BILATERAL SUPRA PIRIFORMIS PELVIC EXIT OF COMMON PERONEAL NERVE: SIGNIFICANCE IN PELVIC AND HIP SURGERY. Int J Anat Res 2017;5(3.2):4275-4279. DOI: 10.16965/ijar.2017.306