Deep Decompression of the Lateral Femoral Cutaneous Nerve Under Local Anesthesia.

OBJECTIVE

Meralgia paresthetica is a mononeuropathy of the lateral femoral cutaneous nerve (LFCN) caused by compression around the inguinal ligament. We report a surgical alternative for the treatment of meralgia paresthetica under local anesthesia and its outcomes.

METHODS

We operated on 12 patients with unilateral meralgia paresthetica whose age at surgery ranged from 62 to 75 years. The mean postoperative follow-up period was 19 months. Microsurgical deep decompression of LFCN was performed with the patient under local anesthesia. Clinical outcomes of surgical treatment were assessed based on the patient's most recent follow-up visit and were classified into 3 categories: complete, partial, or no relief of symptoms. Symptoms of pain or numbness in the anterolateral part of the thigh were evaluated, using a visual analog scale, before surgery and after surgery, i.e., at the most recent follow-up visit.

RESULTS

All patients reported symptom improvement: complete relief in 9 patients (75%) and partial relief in 3 patients (25%). In the 3 patients with partial relief, the remaining symptoms did not affect their daily living. Overall, the visual analog scale scores were significantly improved in all patients (P < 0.05), and no patient experienced postoperative recurrence of their symptoms at the time of the last follow-up visit.

CONCLUSIONS

Symptoms of meralgia paresthetica can resemble those of a lumbosacral disorder. Microsurgical deep decompression under local anesthesia produces good surgical outcomes. The use of local anesthesia contributes not only to reduction of pain during surgery but also eliminates excessive surgical procedures and reduces the duration of hospital stay.