Leg pain due to Spine vein compression.

Hello, My mother is suffering from severe leg pain and she is not even able to walk properly because of that. We have done MRI and it is diagnosed as some of the spinal veins are getting compressed. Kindly note below findings from the MRI report: - Lower most vertebra is labelled as L5. Whole spine screening not possible due to metallic artifact - Bilateral lysis of pedicle of L4 seen with grade I anterolisthesis of L4 over L5 vertebra - Disk degeneration with diffuse disk bulge is seen at L4/5 levels indenting the thecal sac with bilateral foraminal encroachment causing significant compression of bilateral exiting nerve roots(Left > Right). We have consulted a physiotherapist but it did not help. what can be done next ? Is the surgery only option left ? If yes then how much safe it is ? Thanks in advance