This document provides an overview of lung cancer, including what it is, the types of lung cancer, where it can spread, the stages of lung cancer, treatments, prevention, research funding compared to other cancers, and statistics from different countries. It discusses non-small cell lung cancer, small cell lung cancer, extrapulmonary small cell carcinoma, mesothelioma, and rare types. It also examines lung cancer rates and research funding in Madagascar, Germany, and the United States as developed versus undeveloped nations.