Hi @fighter He has seen rheumatologists over the years - one said he had osteopenia, another thought he had psoriatic arthritis. We are now awaiting an appointment at UVM Hospital to see a rheumatologist there. The ND GP is who is referring us - she specializes in connective tissue diseases recommends he get a ligament biopsy to understand more about what is going on. I have also received 2 recs for the Brigham and Women's Hospital in Boston. They have a connective tissue clinic there.