The shoulder MRI results say its not cancer. There is some irritation in the bone causing the marrow to become inflamed. They say it's probably overuse. We have an appointment with orthopedics in a month to see what we need to do to make it better. In the meantime, the best thing Arin can do is rely less on the gait aids and start to put more weight on the prosthetic, so that's what we are working on.
Coincidentally, the orthopedics appointment is the day after Arin's next set of scans, so we will have alot of additional info (and hopefully more good news) at that time.