Joint fluid can then flow into the balloon through the one-way flap valve but cannot return to the joint. Therefore, the ganglion generally becomes larger and larger. The relationship between ganglion formation and occupation and injury is not totally understood. Ganglions can also be seen in and around tendons. A common place where this occurs is the palm of the hand at the base of the finger.
Most hand surgeons allow patients to choose the treatment of their ganglion.
Since we know that these are not cancerous lumps, one can feel comfortable leaving the ganglion alone as long as it is not bothersome. Regardless of the type of treatment, ganglions can recur even with satisfactory surgery.