Wrists are a common location for the development of lumps known as ganglion cysts. These non-cancerous masses are filled with fluid and can appear, disappear, and change in size fairly quickly. They normally grow on the back of the wrist, but can limit movement as well as look unsightly. Their exact cause is not known, but some studies suggest that people who have jobs or hobbies that place increased strain on the wrist are more likely to be affected.

Initially, non-surgical treatments are most likely to be recommended. These can include immobilization of the wrist, and draining the fluid from the cyst, in a procedure known as aspiration. However, if non-surgical methods are unsuccessful, or the cyst reappears after aspiration, then surgery may be necessary. This involves removing the cyst and the joint capsule or tendon sheath, which act as the stalk for it. This minimizes the likelihood of it returning, although it is not guaranteed.