Where are ganglion cysts primarily located?

Ganglion cysts are primarily located near joint capsules or tendon sheaths of the wrist. These cysts are fluid-filled sacs that often develop in areas where there is repetitive motion or joint stress, making the wrist a common site due to its range of motion and use in daily activities.

The formation of ganglion cysts is associated with the synovial fluid that lubricates joints and tendons. When there is irritation or injury, this fluid can accumulate, leading to the development of a cyst. In the wrist, these cysts typically present as soft, movable lumps that can vary in size and may become more prominent with activity or certain positions.

While ganglion cysts can occasionally appear in other areas like the elbow or knees, the wrist is by far the most common site. Their presence in the cervical spine is very rare, which further emphasizes the significance of the wrist as the primary location for these cysts. Thus, the focus on the wrist and its associated structures makes the correct answer clear and aligns with anatomical and clinical observations regarding ganglion cysts.