My friend had a history of trauma 2 yrs back.Intially she was t/t by bed rest,NSAIDs & braces for about 4-6 month.condition slightly improved.Later go for ct & mri & diagnosed as a case of "B/L spondylolysis at L5 with grade 1 anterolisthesis of L5 over S1".at present she has chronic back-ach & lower limb pain,which sometimes become very severe in intensity.she has already restricte her physical activites.please advice what is best T/T for him?Is SURGERY needed?Is this condition progressive?Is complete relief is possible?