A ganglion is a fluid-filled sac or cyst that can appear near a tendon or joint in the wrist or fingers. There is no certain cause, and these ganglia often come and go. They are sometimes an indication of arthritis or ligament injury. Although they are harmless, treatment can sometimes alleviate challenges that come with growth in size, such as discomfort or interference with daily activities. The fluid build-up can often be removed through aspiration with a needle and this very simple procedure has a 50% success rate.

Surgery has a much higher success rate. If surgery is needed, a tourniquet is applied to the arm and the ganglion is removed. This also requires an examination of the underlying area and will result in some scarring. Recovery is straightforward: the joints should be exercised gently right away and the incision is treated with care so that scars are minor.

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