American Board of Surgical Assistants (ABSA) Orthopedic Practice Test

What type of joint is affected by a ganglion cyst?

1. Intercarpal joint

2. Hinge joint

3. Ball and socket joint

4. Pivot joint

The correct answer is: Intercarpal joint

A ganglion cyst typically affects the intercarpal joint, which is located in the wrist area. Ganglion cysts are benign swellings that often develop near joints and tendons, and they can occur at various locations in the body, but they are most commonly found on the dorsal or palmar sides of the wrist where the intercarpal joints are situated. These cysts arise from the synovium, the connective tissue that surrounds joints and tendons, and they are filled with a jelly-like fluid. Given their location, intercarpal joints provide the ideal environment for the formation of a ganglion cyst. The wrist undergoes various movements and stresses, making it prone to the development of these cystic structures. Other types of joints listed, such as hinge joints, ball and socket joints, and pivot joints, have different anatomical structures and functions. While these joints can also experience other types of cysts or pathologies, ganglion cysts are traditionally linked to joints like the intercarpal because of their anatomical relationship with the surrounding soft tissue structures and the joint capsule.