Spontaneous Regression of Extruded Lumbar Disc Herniation: Three Cases Report
A 64-year-old male was admitted to our hospital with radiating pain and numbness in the right lower extremity. The symptom was aggravated one week ago. The motor weakness and sensory change was not noted. Magnetic resonance (MR) images showed extruded herniated nucleus pulposus (HNP) at the L 3-4 level (). He refused surgical treatment, so we performed transforaminal neural block. The symptom was relieved and he was discharged. On subsequent follow up, the symptom appeared to be gradually relieved. Follow-up MR study was done 3 months after and showed no HNP (). He did not complain of any symptom at that time.