why can't lipomas be detected by x ray or ultra sound or mri? I was in an automobile accident & developed a lipoma in my lower back shortly after about the size of a lemon, but because it does not show up on any of the above the insurance doctors are disregarding it as "not there" even though they can see the lump protruding from my lower back. It is causing pain & discomfort into my leg at times & I also at times am awaken during the night as if I am being punched in that area or from discomfort from the pressure of laying on it.
