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Maybe it is Ganglion cyst. This fluid-filled pockets that are connected to the joint cavity usually appear on joint areas such as the wrists, hands, ankles, and so on. It is harmless, but when the size is large or pressing nearby nerves can arise complaints such as pain, movement disorders and so forth. In some cases
ganglion cysts can heal by itself. By your complaints, if I were your treating doctor, I may suggest to:
1. Immobilization, limiting the movement for the cyst does not get bigger and cause pain
2. Aspiration, sucking the contents of a cyst with a syringe, then can be injected
steroids into the bag of cysts to reduce the possibility of the cyst re-formed
3. Operation, which is the removal of the entire bag of cysts at once disconnect the cyst with the joint cavity.
Ganglion cysts that are left generally do not cause serious or dangerous conditions, but if the size increases or has caused a complaint should be done appropriate treatment measures. You can discuss it to
general surgeon about the risks that arise when the ganglion cyst is performed surgically or not.