Germline testing to find genetic alteration that can be linked to inherited susceptibility of developing the disease is recommended for patients diagnosed with certain solid cancers, such as breast, prostate and ovarian, due to strong association with inheritable mutations implying familiar counselling. Non-Small Cell Lung Cancer (NSCLC) is the leading cancer-related cause of death and smoking habitude is the main modifiable risk, while environmental factors, such as radon, asbestosis and fine polluting particles account for most diagnoses among never or light smokers. At the same time, the relative risk (RR) of lung cancer correlates with the number of relatives diagnosed with lung cancer. A recent study of 7788 patients with NSCLC who receiving a germline testing described a prevalence of genetic alterations linked to inherited susceptibility of cancer in 14.9% of cases, highlighting the potential role of genetic However, all the available studies investigating the family history of cancer among patients with NSCLC are retrospective and do not consider modifiable risk factors such as smoking, working habits and geographical origins. The objective of this study is the detailed description of the family history of cancer among patients with NSCLC and the description of distribution of other risk factors, such as smoking, among the study participants, in order to establish whether there are specific family history clusters that can help clinicians in directing patients to genetic counselling. The study will enrol consecutive patients with NSCLC, independently from age, disease stage, smoking status, and clinic-pathological characteristics. Participants will provide clinical anamnestic information filling an ad hoc self-reported study questionnaire, internally validated by the genetic expert of the steering committee. Data of interest include: Family history of cancer; Type of tumours/primary tumour site among relatives with history of cancer; Age at diagnosis among relatives with history of cancer; Biological sex of relatives with history of cancer; Exposure to tobacco smoking and smoking habits among relatives with history of cancer; Geographical origin of participants and relatives with history of cancer; Personal history of multiple malignancies; Potential professional and environmental exposure to carcinogens of participants and relatives with history of cancer; Ethnicity of both participants and relatives with history of cancer. The study does not require any additional hospital access from the patients since the questionnaire will be returned at the following planned clinical consultation to minimize recall bias. The investigators will collect the following clinic-pathologic characteristics: Smoking status (active/passive, package/year, total years of smoking); Eastern Cooperative Oncology Group Performance Status (ECOG-PS); Age at diagnosis; Tumour histology; Tumour stage at diagnosis according to the 8th edition of TNM staging system; Ethnicity; Professional and environmental exposure to carcinogens; Programmed death ligand-1 tumour proportion score (PD - L1 TPS); Any available oncogenic drivers including epidermal growth factor receptor (EGFR), Kirsten rat sarcoma virus (KRAS), BRAF, c-MET, mutations and Anaplastic lymphoma kinase (ALK), ROS-1, RET, neurotrophic tyrosine receptor kinase NTRK translocation/gene fusions; Personal history of other synchronous/metachronous primary malignancies.