The term "Ganglion" relates to the knot or lump of the cells that is positioned below the surface of the skin on the foot. Ganglion cyst foot is a type of tumor (non-cancerous) that grows in the form of lump on the foot. It commonly occurs in the feet though it may develop anywhere in the body. Tumor like growth is present on the joint that covers the tendon muscle.

There would be sacs in the space between the bones and cyst develops when these sacs are filled with fluid. Cyst may also develop on the tendon attached to the bone or muscle of the foot. The ganglion cysts vary largely in size depending on the severity of the problem. In some cases one large cyst is present and on others there may be a cluster of small sized cysts. Sometimes it may disappear on its own, without requiring any treatment but it can always recur after some time. Ganglion cyst is more prevalent in women of age group 25-40 but they are generally harmless. In rare cases, they may develop on the base of fingers and outside of the knee portion.