RT Book, Section A1 Farago, Anna F. A1 Heist, Rebecca Suk A2 Chabner, Bruce A. A2 Longo, Dan L. SR Print(0) ID 1127649249 T1 Small Cell Lung Cancer T2 Harrison's Manual of Oncology, 2e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071793254 LK hemonc.mhmedical.com/content.aspx?aid=1127649249 RD 2024/04/18 AB Lung cancer is the leading cause of cancer-related mortality in the United States with over 172,000 new cases and over 163,000 deaths in 2005 with over 225,000 new cases and 160,000 deaths in 2013. Approximately 14% of lung cancers diagnosed between 2005 and 2009 were small cell lung cancer (SCLC), with the remainder being various subtypes of non-small cell lung cancer (NSCLC) such as adenocarcinoma, squamous cell, and large cell, among others. The proportion of new lung cancers diagnosed that are SCLC has been declining over the past few decades. The reasons for this are unclear but may relate at least in part to the changing composition of cigarettes and inhalation patterns.