A ganglion cyst is a fluid-filled swelling that can occur near a joint or tendon. They are usually harmless, but can be rather unsightly. The cyst can range from the size of a pea to the size of a golf ball. They most commonly form on the back of the wrist, but can appear on your feet, ankles and other parts of your hand too. Other parts of the body are rarely affected.
Ganglion cysts look and feel like a smooth lump under the skin. They're made up of a thick, jelly-like fluid called synovial fluid, which surrounds joints and tendons to lubricate and cushion them during movement. Ganglions can occur alongside any joint in the body, but are most common on the wrist (particularly the back of the wrist), and the hand and fingers.
It is not clear why ganglions form. They seem to occur when the synovial fluid that surrounds a joint or tendon leaks out and collects in a sac.
Local commissioning policies are in place for this condition
Please be aware that there are local commissioning policies in place for this condition. This means that certain treatments may not be available to you on the NHS.
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