Sciatica-Radicular
Pain-MRI Marc
Darrow, M.D. Radicular pain or “radiculopathy” (sometimes also referred to as a
“pinched nerve”) is often described by patients as a deep pain that
travels down the leg. This pain is often accompanied by numbness or
tingling, and muscle weakness in the limb.
The most common example of this type of problem is sciatica. This
radiates down the leg along the sciatic nerve. Sciatica follows the path
down the back of the thigh, into the calf and then into the
foot via
branches of the nerve.
Radicular pain may be caused by an injury to the spine. It may be from
impact injuries that cause compression in the vertebrae, such as those
in sports related injuries or motor vehicle accidents, i.e.,
disc herniation. Or it may be caused by a degenerative process discussed
above such as stenosis or
Degenerative Disc Disease.
It is essential to perform a physical examination in cases of referred
pain to isolate the problem.
It may actually be a ligament injury that appears to be a nerve
impingement and ligament
trigger points may refer pain in a manner
similar to radiculopathy.
This is why relying on an
MRI as the sole diagnostic tool could lead to
unnecessary
surgery. An MRI may show a pre-existing condition that never
caused pain. If surgery was performed to correct this condition and pain
was actually generated by a ligament sprain, the surgery would fail.
A physical examination and conservative treatment will help determine if
this is a ligament injury or a nerve problem.
It is important for the patient to know in cases of radiating pain that
an MRI that indicates slippage of the vertebrae (Spondylolisthesis), an
arthritic condition, or a bulging disc is NOT necessarily an indication
that surgery is needed.
MRIs and Back Pain We typically have patients come
into our office with stacks of MRIs, CT Scans and x-rays to confirm the
label of Degenerative Disc Disease placed on them by other medical
professionals. For example, a woman once came into our office. She had
in essence become the living, breathing “embodiment,” of the problem
that showed up on her film. When she came in, all she could do was talk
about her degenerative disc disease. This woman had pain
in her groin and her back. When we told her we were going to examine her
to determine if this was indeed her problem, she had a lot of
difficulty comprehending that her pain may not come from her
Degenerative Disc Disease at L-5, S-1 because she had already
been diagnosed as needing surgery. There have been many studies and
papers written on the accuracy or correctness of diagnosis based on an
MRI reading.
We know from studies that half the people after a certain age show
disc problems on film but they reported they had no pain.
So if someone has a diagnosis from an MRI the first thing we do is see
if that is REALLY where the pain is coming from. To practice good
medicine we need to rely on MRI, x-ray and CT scans. But we also need to
use our hands to find out where the pain is coming from, being careful
to gently press on the suspect area causing pain. When the physician's
touch elicits an intense pain spot, known as a trigger point or tender
point, this may be a good area to do Prolotherapy.
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