Volume 48, Number 3 (9/2010) (page : 285-7) Case Report
Spontaneous Regression of a Large Lumbar Disc Extrusion
Sung-Joo Ryu, MD; and In Soo Kim, MD, PhD
Department of Neurosurgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea

Although the spontaneous disappearance or decrease in size of a herniated disc is well known, that of a large extruded disc has rarely been reported. This paper reports a case of a spontaneous regression of a large lumbar disc extrusion. The disc regressed spontaneously with clinical improvement and was documented on a follow up MRI study 6 months later. The literature is reviewed and the possible mechanisms of spontaneous disc regression are discussed. 

Key words : Lumbar disc extrusion;Spontaneous regression;MRI.