Ilioinguinal Nerve Entrapment

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Main article: Ilioinguinal Nerve

The ilioinguinal nerve originates from the L1 nerve root along with the iliohypogastric nerve. It is a mixed nerve providing motor supply to the Internal Oblique and Transversus Abdominis muscles, and sensory supply to the anterior one third of the scrotum/labia and root of the penis/clitoris, as well as to the superior medial thigh.


  • Post-surgical
    • Inguinal hernia repair
    • Traumatic trochar from laparoscopic surgery
    • Appendectomy and hysterectomy
    • Abdominoplasty
    • Orchiectomy
  • Other Trauma
    • Blunt abdominal trauma
    • Femoral catheterization
    • Lower external oblique aponeurosis disruption (hockey players)
  • Pregnancy
  • Idiopathic, entrapment at:
    • Paravertebral area
    • Iliac crest
    • Rectus border muscle
    • Inguinal region

Differential Diagnosis