The dorsal capsular ligaments at the second and third CMC joints at the carpometacarpal ridge, forming the base of the carpal boss (os styloideum or CMC osteophyte).
Provides dorsal CMC joint stability at the index and middle metacarpal bases.
The carpal boss (os styloideum) is a bony prominence at the second-third CMC junction, either a separate ossicle or an osteophyte from degenerative CMC arthritis. The overlying dorsal capsular ligaments are involved in the chronic pain from this anomaly. Excision of the boss with ligament repair is the surgical treatment.
Dorsal CMC joint ligament hypertrophy and osteophyte formation producing a painful prominence at the second-third CMC junction, managed by corticosteroid injection or surgical excision.
This website uses cookies to enhance your experience. Some are essential for site functionality, while others help us analyze and improve your usage experience. Please review your options and make your choice.
If you are under 16 years old, please ensure that you have received consent from your parent or guardian for any non-essential cookies.
Your privacy is important to us. You can adjust your cookie settings at any time. For more information about how we use data, please read our privacy policy. You may change your preferences at any time by clicking on the settings button below.
Note that if you choose to disable some types of cookies, it may impact your experience of the site and the services we are able to offer.
Some required resources have been blocked, which can affect third-party services and may cause the site to not function properly.
This website uses cookies to enhance your browsing experience and ensure the site functions properly. By continuing to use this site, you acknowledge and accept our use of cookies.
