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Updated: Jun 30, 2026

Nerve Ultrasound Protocol to Detect Dysimmune Neuropathies
Published on: October 7, 2021
Sonographic assessment of the lateral femoral cutaneous nerve
Benjamin Damarey1, Xavier Demondion, Nathalie Boutry
1Department of Muskuloskeletal Radiology, Hôpital R. Salengro, Rue du Professeur Emile Laine, Lille Cedex, France.
Purpose:
To evaluate the ability of high-frequency sonography to evaluate the lateral femoral cutaneous nerve (LFCN).
Methods:
A cadaveric study was performed on 5 cadavers to outline the normal course of the LFCN. Next, 37 LFCNs in 21 volunteers were evaluated via sonography with a 5-13-MHz linear-array transducer.
Results:
The LFCN was easily identified in our dissections. It always entered the thigh under the inguinal ligament and coursed superficially to the sartorius muscle. In 2/10 (20%) cases, anatomical variants were observed. Sonography revealed the LFCN in 26/37 (70%) cases. The relationships of the nerve with the deep circumflex iliac artery, the anterior superior iliac spine, and the sartorius were visualized. Neuromas were observed bilaterally in 1 volunteer.
Conclusion:
The LFCN can be seen in the groin with the aid of sonography.
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