All NSCLC patients attending the responsible department of treating this type of patients (e.g. Oncology Department, Pneumology Department) for the first time (regardless of whether the patient is diagnosed with locally, advanced or metastatic disease) at the participating sites from the first of January 2009 to the end of March 2009. Patients diagnosed, or even treated, in other departments within the same hospital or in another hospital are susceptible to be included in the study if full access to the patient's medical record is made available.