A member asked:

Would sacrolilitis or si joint dysfuncation cause sciatica? or is piriformis syndrome more likely, had mri of spine and no disk problems found.

A doctor has provided 1 answer
Dr. Edward Hellman answered

Specializes in 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 9/5/2014

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