is spinal stenosis hereitary? at what age does it usually begin affecting an individual, if that is applicable? i have just had an epidural, and it hasn't seemed to work. what's next? i am 66 yrs. old, so i know there is no promise of complete wellness, but i would like to be able to walk just a little more. i would appreciate any information. i would prefer not to have surgery or a fusion. it is in the lumbar region.