The most common cause of lumbar
spinal stenosis is age-related changes of the spine.
These changes include thickening of soft tissues and a gradual deterioration of
joints that connect the spine's vertebrae. Any of
these conditions can narrow the spinal canal. Spinal stenosis usually develops
gradually and may begin to squeeze
the spinal cord or its nerve roots.
Age-related degeneration often
occurs in association with certain disorders:
Other conditions that may cause spinal stenosis
An abnormally narrow spinal canal, which can
be an inherited condition.
which is a defect or fracture on one or both of the wing-shaped parts of a
vertebra. A vertebra may slide forward or backward over the bone below and may
squeeze the spinal cord or a nerve root.