What you have anatomically is a failure of differentiation of the L5 vertebra which only rarely causes pain and certainly would not cause pain in the wrist, shoulder and ankle. Bertolotti’s Syndrome (which is the name for the painful condition-again rare) can cause local pain (in the side of the lower back) only. Have they ruled out a mild form of Rheumatoid Arthritis or other inflammatory disorders? Did they do blood testing including WBC, ESR and CRP?
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.