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Objective:The Percutaneous Epidural adhesiolysis and Decompressive Neuroplasty (PEN) irrigates,releases and decompresses the dorsal root ganglion pathology by way of direct mechanical adhesiolysis (Fanning technique) rather than by way of indirect chemical adhesiolysis.The authors intended to describe the effects,indications and technical details of Percutaneous Epidural adhesiolysis and DecompressiveNeuroplasty (PEN).Methods:From December 2011 to May 2012,the authors performed Percutaneous Epiduraladhesiolysis and Decompressive Neuroplasty (PEN) for 186 consecutive patients and evaluated the short-term(mean 3 months) result after the procedure according to Macnab criteria.Exclusion criteria were samefor the other percutaneous procedures; spinal fracture,spinal infection,spinal tumor,etc.IntraproceduralEpidurogram was prerequisite for determination of the precise causative level.Average operation time was 17 minutes,and patients discharged about 2 hours after the procedure.Results:Male was outnumbered female by 102 to 84 and age was ranged from 20 to 67 years old(mean:42.9).The L4-5 level was the most commonly involved.According to Macnabs outcome criteria,excellent and good outcome was achieved in 163 patients(87.5%),and fair and poor outcome was in 14(7.5%) and 9(5%) patients,respectively.Conclusion:Percutaneous Epidural adhesiolysis and Decompressive Neuroplasty (PEN) by using direct mechanical adhesiolysis (Fanning technique) method in patients with Degenerative Lumbar diseases shows immediate relief of leg and back pain in 87.5% of the patients during the short span of follow-up.However,data collection with respect to the lengthening of population number and follow-up span,and refinement of strict inclusion/exclusion criteria are prerequisite in near future.