A ganglion is the most common mass that develops in the hand.
Ganglion cysts are benign lesions.
No cases of associated malignancy have been reported. A ganglion can be described simply as a fluid-filled sac arising from an adjacent joint capsule or tendon sheath. A ganglion can form from almost any joint or tendon sheath in the wrist and hand. The following drawings describe the most common sites for presentation of a ganglion. Your Indiana Hand Center physician will review this with you during your appointment.