A ganglion cyst is a tumor or swelling that appears on the top of a joint on the back or front of the wrist or the base of a finger. It looks like a sac of liquid. The inside of the cyst is composed of a clear, thick, colorless, jellylike substance. The cyst may feel firm or spongy to the touch. Often, this is dependent on its size. One large cyst or several smaller ones may appear. And although ganglion cysts in Philadelphia patients are relatively common, they do not spread and they are not cancerous. Ganglion cysts are more common in women, and usually occur in individuals between the ages of 20-40. Often they may occur after an injury, but for the most part, it isn't known exactly why they appear. They are capable of changing in size and may simply disappear on their own. If you are looking for ganglion cyst Philadelphia care, call Rothman today to schedule a visit.