Thumb arthritis is common with aging and occurs when cartilage wears away from the ends of the bones that form the joint at the base of your thumb — also known as the carpometacarpal (CMC) joint. Dr. Kyriakedes, a fellowship-trained hand, wrist and elbow orthopedic surgeon with Riverside Orthopedic & Sports Medicine, discusses the physical attributes of thumb arthritis and treatments (both non-surgical and surgical). Learn more by visiting, riversideonline.com/kyriakedes. | Riverside