Thumb arthritis - MayoClinic.com - Mayo ClinicThumb arthritis — Comprehensive overview covers symptoms, treatment of osteoarthritis in your basal (carpometacarpal) joint.Treatment for Basal Thumb Arthritis | eHow.comMost people don't realize the basal joint exists until thumb pain forces a trip to the doctor. The basal joint connects the base of the thumb to the wrist and ...Arthritis of the Thumb Basal Joint - e-Hand The Electronic ...The joint at the base of the thumb which allows for the swivel and pivoting motions of the thumb is referred to as the basal joint or thumb CMC (carpometacarpal) joint.