Hi Roy,

Your commented:

"Somewhere medial to the great trochanter is the greatest pain. But it seems to spread towards my SI joint."

This could be an arthritic hip joint. The pain is felt usually in the groin, the medial side of the greater trochanter.

Anyway, just a thought. If it is your hip, it can be treated conservatively with cortisone, or a hip replacement at the other end of the treatment scale. I had pain in my groin for close to a year before I finally got an xray. I was surprised it was an arthritic hip, but the actual hip joint sits just under the groin.

All the best to you.

Joe