I ve been told by my Rheumatologist, that I have to have knee replacement surgery on both knees BEFORE I can have any surgery on my back (lumbar and lower sacrum). I have degenera- tive spine problems. Currently I can not straighten my left leg out, as my knee is so huge and is killing me. The right isn t as bad, but believe me, it s not pain free. I am a 62 year old caucasin woman about 5 6 , 190 lbs. (down from a high of over 300#)I also have been diagnosed w/ coronary heart disease in April this year, fibromyalgia, Lupus, Sjogrens and a few others What s your opinion? Thank you in advance for your advice. hurts too.