Cancer staging characterises the extent of disease facilitating selection of the most appropriate management and therapy and providing prediction of prognosis.As understanding of lung cancer evolves the opportunities arises to adjust disease staging.The adoption of the 7th edition tumour,node,metastasis staging system should result in improved treatment selection and more accurate prognostic information for the individual patient. Cancer staging characterises the extent of disease facilitating selection of the most appropriate management and therapy and providing prediction of prognosis. A understanding of lung cancer evolves the opportunities arises to adjusting disease staging. The adoption of the 7th edition tumor, node, metastasis staging system should result in improved treatment selection and more accurate prognostic information for the individual patient.