A lumbar tumor

The nervous system called the sciatic nerve is the nervous system going along a back and the waist which can be called the pivot of the body.
It is the very important nervous system controlling the exercise functions of lower limbs.
And the neuropathic cause by the nervous system said to be sciatic neuralgia being pressed tends to be up around the nervous system.
And there is a disease that a bone is destroyed by a tumor in the one.
I am called alias cancer with the tumor, and it is said that I tend to spread from the internal organs.
Then why will a lumbar tumor cause the sciatic neuralgia?
The lumbar tumor destroys a bone.
And the destroyed bone stimulates the nervous system called cauda equina nervous system and Kiyone God going along the neighborhood.
By this nerve stimulation and pressure, I come to feel a feeling of pain and numbness to a waist and a leg.
The inspection of the lumbar tumor is performed by video diagnosis to distinguish it from other diseases.
However, I take the part of the bone last and inspect it and judge it.
A tumor about sciatic neuralgia has the thing called the cauda equina tumor elsewhere, too.