The genitofemoral nerve arises from L1-L2 and descends on the anterior surface of psoas major, dividing into genital and femoral branches at the level of the inguinal ligament. At the lumbar level it traverses the psoas and is at risk during retroperitoneal approaches.
Genitofemoral neuralgia from lumbar plexus injury or psoas entrapment produces burning groin pain and anterior thigh numbness. It is a recognised complication of laparoscopic inguinal hernia repair (TEP/TAPP), retroperitoneal lymph node dissection, and lumbar disc surgery. Genitofemoral nerve block at the L1 level targets the nerve before it enters the psoas.
Burning groin pain and anterior thigh numbness from genitofemoral nerve compression in the psoas muscle or retroperitoneum, a complication of laparoscopic hernia repair or retroperitoneal surgery managed by nerve block and neurolysis.
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