Is small cell lung cancer contagious? Clinically confirmed that small cell lung cancer is not contagious

Small cell lung cancer is a common malignant tumor. It is not contagious and has no corresponding transmission routes or sources of infection, so it is not contagious.

The onset of small cell lung cancer is mainly related to environmental factors, disease factors, genetic factors, and acquired factors such as smoking, and it is not contagious. Infectious diseases require three conditions: the corresponding source of infection, the route of transmission, and the susceptible population. Small cell lung cancer does not meet the above three conditions and does not fall into the category of infectious diseases.
Small cell lung cancer itself is not an infectious disease and is not contagious. Like other malignant tumors, it is not contagious regardless of clinical stage or pathological type. However, small cell lung cancer is affected by genetic factors and has the characteristics of familial clustering, so it is mistakenly considered to be contagious and needs to be carefully identified.