I was having pain in my leg, like a pinched nerve. Had x-rays, but it didn't show anything.So they did MRI which showed a herniated disc L4 L5 which is pinching the nerve, but then the doctor says it also shows these white leasions. I asked what are they, he didn't really didn't have an answer, except it could be cancer!. The only treatment was phyical therapy and a bone density test and he would see me again in 4 weeks. As he couldn't explain what they leasions and mentioned cancer in the same sentence, I didn't lease his office with a very warm fuzzy feeling.