CHICAGO - Pinching, gripping, squeezing, and lifting all sound like simple tasks, but for Marcy Dub, thumb arthritis made ... Cohen recommends carpometacarpal arthroplasty, or CMC surgery.

The most common type—osteoarthritis, or wear-and-tear arthritis—occurs commonly in the joint at the base of the thumb, where the thumb meets the wrist. This joint, called the carpometacarpal ...