<unk>  are hard, bony outgrowths or gelatinous cysts on the proximal interphalangeal joints (the middle joints of fingers or toes.) They are a sign of osteoarthritis, and are caused by formation of calcific spurs of the articular (joint) cartilage.<unk>  are comparable in presentation to Heberden's nodes, similar osteoarthritic growths on the distal interphalangeal joints, but are significantly less common.
Bouchard's nodes
Heberden's node
Osler nodes
Schmorl's nodes
Osler's node
Virchow's node
Sentinel lymph node
Hilum