Since clinical practicing is a challenging job, evidence based practice is required.

"In my experience Nearly 80 % of Extruded Disc Patient who are fit for surgery can get relief in pain and deformity effectively if proper physical therapy treatment given."

References - 

1. J Rehabil Med 2014; 46: 233–240

A structured physiotherapy treatment model can provide rapid relief to patients who qualify for lumbar disc surgery: A PROSPECTIVE COHORT STUDY

Gunilla Limbäck Svensson, RPT, PhD, Gunilla Kjellby Wendt, RPT, PhD and Roland Thomeé, RPT, PhD.

2. Peul WC, van den Hout WB, Brand R, Thomeer RT, Koes BW.Prolonged conservative care versus early surgery in patients withsciatica caused by lumbar disc herniation: two year results of randomised controlled trial. BMJ 2008; 336: 1355–1358.

3.Paatelma M, Kilpikoski S, Simonen R, Heinonen A, Alen M, VidemanT. Orthopaedic manual therapy, McKenzie method or advice only for low back pain in working adults: a randomized controlled trial with one year follow-up. J Rehabil Med 2008; 40: 858–863.