Effective radiofrequency lesioning for obturator nerve neuropathy

A 73-year-old female complained of pain in the right lower-abdomen and medial aspect of the distal thigh after a gynecological operation. Computer tomography and MRI findings excluded obturator canal herniation or lumbar plexopathy. Both lumbar epidural block and obturator nerve block with local anesthetics were effective, except their limited duration of pain relief and muscle weakness for several hours after the blockade. Treatment with radio-frequency lesion of 50 degrees C for 60 seconds of the right obturator nerve relieved her pain for 9 months without muscle weakness. This case shows usefulness of radiofrequency lesion for obturator nerve pain.