Genitofemoral Nerve Injury (L1-L2)
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Overview
Plain-Language Overview
Genitofemoral nerve injury (L1-L2) affects a nerve that provides feeling to the upper thigh and the genital area. This nerve is part of the peripheral nervous system, which connects the spinal cord to the skin and muscles. When this nerve is damaged, it can cause pain, numbness, or tingling in the groin and inner thigh. The injury may also affect muscle control in the area, leading to weakness. This condition often results from surgery, trauma, or compression near the lower spine or abdomen.
Clinical Definition
Genitofemoral nerve injury (L1-L2) is a peripheral neuropathy involving damage to the genitofemoral nerve, which arises from the L1 and L2 spinal nerve roots. The injury typically results from surgical trauma (e.g., during hernia repair or retroperitoneal procedures), direct nerve compression, or blunt trauma. This nerve provides sensory innervation to the anterior scrotum or labia majora and the upper anterior thigh, as well as motor innervation to the cremaster muscle in males. Clinically, patients present with groin pain, hypoesthesia or anesthesia in the nerve distribution, and sometimes an absent cremasteric reflex. The injury is significant because it can cause chronic pain and sensory deficits that impair quality of life.