Letters to the EditorLETTER TO THE EDITOR Sacroiliac joint dysfunction: hypomobility and hypermobility Bruno Bordoni, DO, PhD Notes and Affiliations Notes and Affiliations Received: December 23, 2021 Accepted: January 18, 2022 Published: March 28, 2022 Bruno Bordoni, DO, PhD, Department of Cardiology, Foundation Don Carlo Gnocchi IRCCS, Institute of Hospitalization and Care, Milan, Italy J Osteopath Med; 122(6): 331-332 https://doi.org/10.1515/jom-2021-0297