Intervention; interposition; the act of a third person who interferes between two contending parties with a view to reconcile them or persuade them to adjust or settle their dispute.
Subchondral cyst formation is characteristic of osteoarthritis and can be routinely found on x-rays. A subchondral cyst is a fluid-filled sac that extrudes from the joint, consisting of thickened joint material (mostly hyaluronic acid, a substance found in the normal joint fluid that serves to lubricate the joint). Subchondral bone is the layer of bone just below the cartilage.
A ganglion cyst is a fluid-filled bump that forms under the skin near a joint, most commonly in the wrist area, and sometimes in the shoulder, elbow, hip, knee, ankle, or foot regions. The conventional medical view of ganglion cysts is that they are idiopathic, meaning that definitive causes are not known.