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Meralgia Paresthetica G57.10 355.1

 

synonyms:LFCN

Meralgia Paresthetica ICD-10

Meralgia Paresthetica ICD-9

  • 355.1

Meralgia Paresthetica Etiology / Epidemiology / Natural History

  • Painful syndrome of the thigh related to entrapment of the lateral femoral cutaneous nerve 
  • Etiology: idiopathic,  trauma,  iatrogenic (surgery, abduction splints)
  • LFCN may be encased in bone from the anterior superior iliac spine, or entrapped in fascia either proximal or distal to the ASIS

Meralgia Paresthetica Anatomy

  • Lateral Femoral Cutaneous Nerve provides sensation to the lateral thigh.
  • Originates from the lumbar plexus.
  • Runs on the surface of the iliacus muscle and enters the thigh by passing under the inguinal ligament before piercing the fascia lata
  • Location is variable.
  • Average medial distance from the ASIS is 20.4 millimeters, with a range of three to forty-six millimeters. In no specimen did the nerve pass lateral to the ASIS. The lateral femoral cutaneous nerve lies anterior to the iliopsoas muscle. (Hospodar PP, JOT 1999 Jan;13(1):17-9)
  • see also: Lateral Femoral Cutaneous Nerve.

Meralgia Paresthetica Clinical Evaluation

  • Numbness, burning, paresthesias, and pain in the anterolateral thigh, purely sensory

Meralgia Paresthetica Xray / Diagnositc Tests

  • A/P pelvis, A/P and lat of affected hip generally normal
  • Reproduction of the pain by deep palpation just below the anterior superior iliac spine and/or by hip extension
  • May have relief of symptoms by localized injection of the LFCN with lidocaine;
  • diagnosis can be supported by SSEP or nerve conduction

Meralgia Paresthetica Classification / Treatment

  • Nsaids
  • Local steroid injections
  • Consider neurolysis, and or transposition in severe cases.

Meralgia Paresthetica Associated Injuries / Differential Diagnosis

  • pelvic tumor
  • OA
  • upper lumbar nerve compression

Meralgia Paresthetica Complications

Meralgia Paresthetica Follow-up Care

Meralgia Paresthetica Review References

  • JAAOS 01 9:336

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