In adults and older age group, Low back pain is very common reason for seeking medical attention. Herniated lumbar disc accounts for majority of cases in them, requiring a refinement in management strategy. However, spontaneous disappearance of large herniated lumbar disc has been reported very rarely in the literature till the time being. The authors here report a distinctive case of spontaneous regression of a large extruded lumbar disc in a 50 year old male. The patient presented with remarkably large lumbar extruded disc with backache and progressive neurological deficits. Patient was advised for surgical discectomy but he was lost to follow up. Later on the disc regressed spontaneously as evident on MRI scan done after 6 months along with improvement in clinical symptoms. This paper has reviewed various literature & also discussed possible mechanism of disc regression with its impact on outcome.

Keywords: Lumbar Disc Herniation; Spontaneous Regression; MRI; Foraminal Stenosis; Cauda Equina Syndrome.