Whoa!!
When you wrote about sacroilliac joint dysfunction, I cringed in pain. I've had the reocurring problem with my left sacroilliac joint for thirty-five years. It's a chronic condition without a cure. It's usually an impact injury from something like getting speared while playing football. I'm now seeing the best physical therapist I've ever dealt with. The day after a treatment, I can barely get out of bed, but after a few hours I'm feeling pretty human.
Like most people with sacroiliac joint dysfunction, I was misdiagnosed with L-4, L-5 disc hernias for many years. It's a very common diagnostic miss. Here's a website with alot of information:
http://www.sidysfunction.com/
Take a look at the L-5 as it relates to the sacroiliac on the diagram located at:
http://www.patient.co.uk/showdoc.asp?doc=21692497
Strangely, in my own case, after a recent round of x-rays and an MRI, it was found that I have old compression fractures of the T-12, and C1 and C2.
Re: Sacroiliac dysfunction. Be sure you have exact measurements of your outer hip to heel taken for each leg. I was awakened to the fact that my right leg, hip to heel, is 1.25 inches longer than my left leg. That's almost 60 years of stepping in a small hole with every left step; and very hard on the sacroiliac. A simple lift in the left shoe makes a world of difference.