THE AMERICAN-THORACIC-SOCIETY LYMPH-NODE MAP - A CT DEMONSTRATION

It is now a decade since the American Thoracic Society (ATS) lymph nod e map was first described. Recently it has been upgraded to include su praclavicular and superior diaphragmatic lymph nodes. By standardising terminology the map aids in the provision of a more valid data base t o evaluate diagnostic techniques and therapeutic protocols. Despite th ese potential benefits the map has failed to gain widespread use among st European radiologists. This essay illustrates the relationship of t he nodal stations to normal anatomy utilizing calcified nodes on CT sc ans. The ease with which the map can be applied to cross-sectional ana tomy is emphasized. It is hoped that the images will act as a teaching aid to promote greater acceptance and use of the ATS map. The relatio nship of the nodal stations to the new American Joint Classification o f disease extent is also outlined.