
Ganglion cyst on the back of the wrist. This is called a dorsal carpal gangion cyst. These are very common masses on the back of the wrist

This is a ganglion cyst on the back of the last joint in the finger. This is typically called a mucous cyst. These cysts can sometimes cause some ridging and deformity of the nail bed.

This shows a typical dorsal carpal ganglion on the back of the wrist

One of the treatment options of a dorsal carpal ganglion is excising it arthroscopically.