How can cancer cause compression of the spinal cord?

See below: The spinal canal is canal encased by the bony vertebral column. There isn't a lot of extra room in there and the canal can't stretch or expand. If a tumor begins to occupy space within the canal then there's no room for what's supposed to be there, the spinal cord. , .

By growing on or : Cancer can affect the bones of the spine leading to deformity or a fracture compressing the spinal cord or the cancer can grow about the spinal cord and enlarge placing compression like a disc herniation or spinal stenosis or even grow fron within the spinal cord leading to compression effects.