Not sure who all is on FB, so will post here also.
Jim is home. This link talks about the Hip Bone area, and the ilium. They are pretty sure that it’s the ilium that is causing the problem from the CS, but will know more when they open it up. Jim can’t get MRI’s which would have given them more info. At this point it’s waiting for scheduling and such. Thanks for all the kind words.
Hip bone – Wikipedia
The hip bone (innominate bone, pelvic bone or coxal bone) is a large flat bone, constricted in the center and expanded above and below. In some vertebrates (including humans before puberty) it is composed of three parts: the ilium, ischium, and the pubis.