Meralgia Paresthetica Review: Update on Presentation, Pathophysiology, and Treatment

Outcomes of lateral femoral cutaneous nerve decompression surgery in meralgia paraesthetica: assessment of pain, sensory deficits, and quality of life

PURPOSE

Meralgia paraesthetica (MP) is a rare neuropathy of the lateral femoral cutaneous nerve (LFCN), characterized by thigh pain, paraesthesia, or sensory loss. When conservative treatments fail, surgical interventions such as neurolysis or neurectomy are considered. This study aims to evaluate the effectiveness of surgical decompression of the LFCN in alleviating pain, addressing sensory deficits, and improving quality of life.

METHODS

A prospective study was conducted on 26 patients who underwent LFCN decompression surgery between 2015 and 2023, with a minimum follow-up period of one year. Outcomes were assessed using pre- and postoperative questionnaires, including the Brief Pain Inventory (BPI) and the Pain Disability Index (PDI).

RESULTS

The cohort consisted of 15 males and 11 females, with 81% reporting symptom onset following prior surgeries or trauma. Postoperatively, 95.8% of patients experienced pain relief, with 76.9% achieving complete pain resolution (NRS 0). There was a significant reduction in average perceived pain (from 6.6 ± 1.9 to 0.7 ± 1.1; p < 0.001) and maximum perceived pain (8.0 ± 1.54 to 1.0 ± 1.67; p < 0.001). Full sensory function was restored in 61.2% of patients, and quality of life scores improved markedly, with an average increase of 8.4 out of 10 points (± 1.9; p < 0.001).

CONCLUSION

These results demonstrate that neurolysis of the LFCN is highly effective in the treatment of refractory MP, offering substantial pain relief, sensory restoration, and improved quality of life. Furthermore, patients with previous injuries or surgeries benefited most from NL, suggesting that these factors serve as positive prognostic indicators.

Comparing the Anatomy of the Lateral Femoral Cutaneous Nerve in Patients With and Without Meralgia Paresthetica: A Systematic Review and Meta-Analysis

The anatomical variations of the lateral femoral cutaneous nerve (LFCN) are well documented, with several studies hypothesizing that specific variants may increase the LFCN's susceptibility to meralgia paresthetica (MP). This systematic review and meta-analysis aimed to compare the prevalence of LFCN anatomical variations among limbs with and without MP. It also sought to determine if the LFCN's cross-sectional area (CSA) on ultrasound differed between limbs with and without MP. PubMed, SCOPUS, CINAHL, and Cochrane databases were used to query publications from inception to June 13, 2024. Included studies had a population of living patients, with or without the diagnosis of MP, and reported on the LFCN's exit from the pelvis, branching patterns, distance from the anterior superior iliac spine (ASIS), and/or CSA on ultrasound. Eighteen studies were included, nine retrospective and nine prospective, with a total of 1512 nerves. The LFCN in limbs with MP was closer to the ASIS (p < 0.01) and the MP limbs had a higher percentage of nerves exiting the pelvis lateral to or over the ASIS (p < 0.01) when compared to healthy limbs. The CSA was larger in the nerves affected by MP compared to the unaffected nerves (p < 0.01). The results demonstrate that specific anatomical variations of the LFCN, where the nerve courses in a more lateral or superficial position, may increase its susceptibility to developing MP. The differences in nerve CSA also show the potential utility of ultrasound as a diagnostic adjunct for MP.

The Diagnosis and Management of Meralgia Paresthetica: A Narrative Review

Meralgia paresthetica (MP) is a sensory mononeuropathy affecting the lateral femoral cutaneous nerve. Diagnosis is typically made clinically, often utilising multiple diagnostic aids such as imaging and electrophysiology. Upon diagnosis, the management of MP follows the standard ladder, with conservative management first line, followed by steroid injection and finally surgery. Surgery may be neurolysis or neurectomy. A literature review of the PubMed database was performed identifying 594 papers regarding MP or the lateral femoral cutaneous nerve. Following a two-stage screening process and reference searching, 34 articles were included in this review, 11 discussing diagnosis and 23 discussing management. Despite the longstanding knowledge of MP, there remains limited comprehensive research discussing its diagnosis and management. Diagnosis of MP is based on clinical examination, imaging and electrophysiology. There is no obviously superior diagnostic strategy for MP. Once that diagnosis is made, the management strategy is typical of any condition, wherein a patient will move up the intervention ladder. It is apparent that conservative management and steroid injection are both adequate in most patients. Where these strategies fail, surgical options such as decompression, radiofrequency ablation or neurectomy are suitable for the majority of remaining patients. While both neurolysis and neurectomy are described as appropriate strategies, there is a scope for discussion regarding whether one is superior. Other management strategies such as botox, acupuncture and kinesio taping may have some value, but limited research exists on these strategies and further research into these is required.

MR Imaging of Entrapment Neuropathies of the Hip

Entrapment neuropathies of the hip (ENH) can occur due to a variety of causes with clinical symptoms that may mimic musculoskeletal disorders. Etiologies include entrapment in a fibromuscular canal, tethering due to posttraumatic fibrosis and extrinsic compression from muscle hypertrophy or a mass. Magnetic resonance (MR) imaging enables detection and characterization of peripheral nerve pathology. In addition, MR imaging can impact both diagnostic judgment as well as therapeutic management (nonoperative and operative management) of patients with ENH. This review article will summarize the role of MR imaging in detection, characterization, and management of nerve entrapments around the hip joint.

Less Common Mononeuropathies

Uncommon mononeuropathies are challenging to diagnose as they can mimic joint pathology, radiculopathies, or plexopathies. They are less easily diagnosed due to unfamiliarity with their clinical presentation, knowledge of anatomy, and less commonly used diagnostic studies. A careful history, physical examination, and electrodiagnostic evaluation can help identify these neuropathies in a timely manner to administer the best treatment for resolution of symptoms. Recent advances in ultrasound and magnetic resonance techniques are used to confirm clinical suspicion of peripheral neuropathy by clearly depicting the anatomy and pathology as well as describing findings that mimic mononeuropathy. It is important for neurology, orthopedic, rheumatology, emergency, and primary care physicians to be familiar with less common mononeuropathies.

Meralgia Paresthetica as a Result of Surgery With an Emphasis on Harvesting Iliac Bone Grafts: A Review

Meralgia paresthetica is a neurological disorder characterized by a symptom complex of numbness, burning, tingling, aching, or stabbing in the anterolateral portion of the upper thigh. Typically, this disorder is seen in patients with diabetes mellitus, obesity, and pregnancy. Also, it may result from a wide array of surgical interventions involving the region of the anterior superior iliac spine. Underlying pathophysiology concentrates on entrapment neuropathy of the lateral femoral cutaneous nerve (LFCN). Due to its location and wide anatomic variation, the LFCN is susceptible to compression, scarring, and injury during surgery. It is important to understand the regional anatomy. In addition, the plastic surgeon must have a working knowledge of the most common variations that can precipitate entrapment and increase susceptibility to injury during surgery. Surgeons lacking a substantial background on the numerous risk factors, origins, and anatomic variations of the LFCN may place patients at an even higher risk of damage to the nerve. An extensive knowledge of the anatomy and careful technique may be utilized by surgeons to prevent iatrogenic neuropathy of the LFCN.

Characteristics, reliability, and quality of YouTube videos on meralgia paresthetica: a descriptive cross-sectional study

INTRODUCTION

The purpose of this study was to evaluate YouTube videos on meralgia paresthetica (MP) for reliability, quality, and differences between quality levels.

METHODS

We analyzed 59 videos related to MP. We evaluated several video characteristics, including views, likes, dislikes, duration, and speaker profile. We used view ratio, like ratio, Video Power Index (VPI), Global Quality Scale (GQS), JAMA criteria, and modified DISCERN (mDISCERN) to assess viewer engagement, popularity, educational quality, and reliability.

RESULTS

The videos received a total of 4,009,141 views (average 67,951.54), with 25.4% focused on exercise training and 23.7% focused on disease information. Mean scores were mDISCERN 2.4, GQS 2.8, and JAMA 2.1. Physician-led videos had higher mDISCERN scores, while allied health worker-led videos had more views, likes, dislikes, view ratios, and VPI. Poor and high-quality videos differed in views, likes, view ratio, VPI, and duration. Positive correlations existed among mDISCERN, JAMA, and GQS scores, with video duration positively correlated with GQS.

CONCLUSION

The content of YouTube videos discussing diseases significantly influences viewer engagement and popularity. To enhance the availability of valuable content on YouTube, which lacks a peer review process, medical professionals must contribute high-quality educational materials tailored to their target audience.

Exoscope for revision of right lateral femoral cutaneous nerve decompression

The exoscope serves as a valuable addition or alternative to traditional microscope systems in surgery, offering 3D visualization and magnification with enhanced maneuverability. In lateral femoral cutaneous nerve decompression for meralgia paresthetica, the exoscope is effective in identifying strictures of neural compression and minimizing iatrogenic nerve damage that may lead to improved pain management outcomes for patients. In this report, the specific case presented showcases how the exoscope aided in surgical decompression of the lateral femoral cutaneous nerve of a patient with refractory meralgia paresthetica with remote previous decompression and resultant scarring. The video can be found here: https://stream.cadmore.media/r10.3171/2023.10.FOCVID23162.

Surgical Approaches in Total Hip Arthroplasty

The Total Hip Arthroplasty (THA) has become one of the most reliable surgical interventions that has improved the quality of life in many patients. THA allows patients to have increased mobility, range of motion, and reduced pain in patients with degenerative hip joints. This surgical procedure has become an effective treatment option for several chronic conditions affecting the hip joint. Although this surgery has been shown to give promising results in patients with hip pathology, selecting the approach for THA is a critical step in pre-operative planning. The best approach for this surgical procedure depends on multiple factors and each present with their own challenges, success rates, and limitations. To further elucidate the advantages and disadvantages associated with different surgical approaches, we critically review each surgical approach along with the different causes of failure of the THA procedure.