Lumbar Spinal Stenosis
Spinal Stenosis is a narrowing of one or more areas in your spine. This
occurs most often in your neck or lower back. When this narrowing takes
place, it can put pressure on the spinal cord or spinal nerves at the
level of compression.
The most common cause of lumbar spinal stenosis is associated with age-related
changes in the spine such as degenerative arthritis (osteoarthritis).
Arthritis that commonly occurs as part of the aging process can lead to
loss of the cartilage between the bones at the joints, the growth of bony
spurs that push on the spinal cord, thickening of the ligaments that help
hold the bones of your spine together, as well as loss of the normal height
of the discs between the vertabrae. These changes in the spinal column
reduce the normal space available for the nerves and can press directly
on the nerve tissues resulting in spinal stenosis.
The symptoms of spinal stenosis may vary depending on which nerves are
affected. Common symptoms of lumbar stenosis may include:
- Numbness, weakness, cramping, or pain in the legs, feet or buttocks usually
worse when walking, standing straight, or leaning backward. The pain may
get better when you sit down or lean forward.
- Stiffness in the thighs and/or legs.
- Low back pain.
- Loss of bladder / bowel control (in severe cases.
Spinal Stenosis of the lumbar spine can be difficult to diagnose as its
signs and symptoms are similar to many other age-related conditions. Diagnosis
starts with a complete medical history and a physical examination. It
is important that you provide your doctor with pertinent information such
as when the symptoms started and how long they have been present as well
as what positions make it feel better or worse if any and if there are
any other symptoms or medical conditions the doctor needs to be aware of.
Tests such as X-rays, MRIs, and CT Myelogram may be ordered to assist in
the diagnosis. Although an X-ray isn't likely to confirm spinal stenosis,
it can help rule out other similar conditions such as fractures and bone
tumors. MRIs can detect damage to discs and ligaments as well as detect
the presence of tumors. It will also show whether or not there is pressure
on the spinal cord or nerves. During a CT Myelogram X-rays are taken after
a contrast dye is injected into the spinal column. This will show whether
there is evidence of herniated discs, bone spurs or tumors.