Ganglion cyst is a fluid filled sac that grow out of connective tissue between muscles and bones of tendons. Constant stress to the wrist seems to be a common indicator for developing ganglion cysts. Most are not painful, but some that are large enough to press on nerves may become painful. Ganglion cysts may be diagnosed with ultrasound or MRI scans. On an MRI these cysts appear very bright on T2 scans and dark on T1 scans. Treatment may include immobilization since constant activity my cause the ganglion cyst to get bigger. Aspiration or draining the ganglion cyst may help relieve the pain. Finally, surgery may be utilized, but there is no guarantee the cyst will not grow back.
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