Role of imaging techniques in the TNM classification of non-small cell bronchogenic carcinoma

The Seventh Edition of the TNM classification for non-small cell bronchogenic carci- nomas includes a series of changes in the T and M descriptor, in particular a re-classification of malignant pleural and pericardial effusions and of separated tumor nodes, new tumour size cut- off values and sub-divisions of the T1---T2 and M1 categories. We review these corrections that led to the changes in the staging system that affects stages II---III. Furthermore, we describe and illustrate the role of the different imaging techniques in tumour staging (CT, PET, PET--- CT and MRI), highlighting their respective indications, advantages and disadvantages, as well their complementary function. © 2010 SERAM. Published by Elsevier Espana, S.L. All rights reserved.