The spread of some forms of cancer usually follows an orderly progression, spreading first to regional<unk>  nodes, then the next echelon of<unk>  nodes, and so on, since the flow of<unk>  is directional, meaning that some cancers spread in a predictable fashion from where the cancer started. In these cases, if the cancer spreads it will spread first to<unk>  nodes<unk>  glands) close to the tumor before it spreads to other parts of the body. The concept of<unk>  surgery is to determine if the cancer has spread to the very first draining<unk>  node (called the<unk> ") or not. If the<unk>  does not contain cancer, then there is a high likelihood that the cancer has not spread to any other area of the body.
Sentinel lymph node
Bouchard's nodes
Resection margin
Heberden's node
Osler's node
Medial supraclavicular lymph node
TNM staging system
Posterior triangle of the neck