Implications of new (seventh) TNM classification of lung cancer on general radiologists--a pictorial review.

The new TNM (seventh) classification of lung cancer, published by Union Internationale Centre le Cancer, has been in use since January 2010. It is vital for general radiologists to be well versed with this system and be aware of the impact of these changes on patient management and prognosis. It is also important that radiologists appreciate the implications of the new system on reporting different imaging modalities and its limitations. This pictorial essay outlines the proposed changes, its limitations, and implications for radiologists.