A 31-year-old female asked:
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would sacrolilitis or si joint dysfuncation cause sciatica? or is piriformis syndrome more likely, had mri of spine and no disk problems found.

1 doctor answer
Dr. Edward Hellman
28 years experience Orthopedic Surgery
Yes : An abnormality of the SI joint such as an inflammatory condition, for example can cause a "sciatica". This is because the L5 nerve, which forms part of the sciatic nerve, runs right over the SI joint. Piriformis syndrome is another example of a condition that is not spine related but can cause sciatica. A detailed exam can usually destinguish the cause.
Answered on Sep 5, 2014
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