Scientific Article

Skeletal Radiology

, Volume 42, Issue 6, pp 803-808

First online:

Meralgia paresthetica: 3-Tesla magnetic resonance neurography

  • Avneesh ChhabraAffiliated withRussell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine Email author 
  • , Filippo Del GrandeAffiliated withRussell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine
  • , Theodoros SoldatosAffiliated withRussell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine
  • , Majid ChalianAffiliated withRussell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine
  • , Allan J. BelzbergAffiliated withDepartment of Neurosurgery, Johns Hopkins University School of Medicine
  • , Eric H. WilliamsAffiliated withDepartment of Plastic Surgery, Johns Hopkins Hospital and Dellon Institute for Peripheral Nerve Surgery
  • , Farahani S. JalaliAffiliated withRussell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine
  • , Gaurav K. ThawaitAffiliated withRussell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine
  • , John EngAffiliated withRussell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine
    • , John A. CarrinoAffiliated withRussell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine

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Abstract

Objective

To assess the diagnostic accuracy and observer performance of 3-Tesla magnetic resonance neurography (MRN) in the evaluation of meralgia paresthetica (MP).

Materials and methods

Two independent readers were blinded to the clinical diagnosis and evaluated the MRN studies of the pelvis of 11 patients with MP and 28 control participants. In each study, the lateral femoral cutaneous nerves were assessed for signal alteration and/or neuroma formation, indicating lateral femoral cutaneous neuropathy, at various levels along their course. Intra- and inter-observer reliability was evaluated.

Results

Both readers exhibited substantial intraobserver agreement in detecting signal alterations and neuroma formation of the lateral femoral cutaneous nerve (LFCN). The readers demonstrated moderate interobserver agreement in detecting signal alteration of the LFCN and poor interobserver agreement in diagnosing neuroma formation. Sensitivity, specificity, positive predictive value, and negative predictive value of LFCN neuropathy diagnosis were ≥71 % and ≥94 % for both readers respectively. The diagnostic test accuracy was ≥90 % for both readers.

Conclusion

3-Tesla MRN provides reliable and accurate diagnostic evaluation of meralgia paresthetica.

Keywords

Meralgia paresthetica Magnetic resonance neurography 3-Tesla