This study will be based upon the analysis of samples and patient-related data already available at the various investigation sites. There will be no study treatment and no study-specific procedure carried out on the patients.
Clinical data collected will include patient demographics (age, gender), Tumor, Node, Metastasis (staging system) \[TNM stage\], histopathologic description and the patient smoker status. Strict anonymity of patient data will be maintained.
This retrospective study is based upon the analysis of archived formalin-fixed paraffin-embedded tissue samples and patient-related data already available at the investigational site.
