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genitofemoral nerve injury

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Genitofemoral nerve

  • origin at the L1 and L2 level
    • at the inguinal ligament it forms two main branches, the genital and femoral branches
    • femoral branch travels lateral to the femoral artery and gives sensory innervation to the upper part of the femoral triangle
    • genital branch
      • in males, it travels through the inguinal canal, along with the spermatic cord, and supplies the cremaster muscle and the scrotal skin
      • in females, it ends in the skin of the mons pubis and labia majora
      • genitofemoral nerve is responsible for both the efferent and afferent limbs of the cremasteric reflex. The ilioinguinal nerve (L1) is also involved in the afferent limb of the reflex.

  • genitofemoral nerve injury is most commonly caused by surgical trauma
    • other causes reported include direct trauma to the inguinal region and tight clothing
    • clinical features
      • main presenting complaint is pain and a burning sensation in the groin, which radiates to the inner thigh. aggravating factors including walking, stooping and hyperextension of the hip
      • examination findings reveal tenderness and possible hyperaesthesia along the inguinal canal
      • provocative testing involves internal or external rotation of the hip joint

Reference:

  • 1) Starling JR, Harms BA. Diagnosis and treatment of genitofemoral and ilioinguinal neuralgia. World J Surg 1989; 13: 586-9

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