世界上最常见的癌症是哪一种？
答案是：肺癌。
肺癌不仅是世界上最常见的癌症类型，也是最凶险的。每年有150万人被肺癌夺去生命，高于乳腺癌、结直肠癌和前列腺癌的总和1。
据统计，2/3以上的肺癌患者在确诊时已是晚期，癌细胞已扩散至身体其他部位2。即使经过手术、放疗和化疗，肺癌仍是生存率最低的癌症类型之一。如果不加治疗，肺癌患者的生命仅能维持数月3。
但是，时至今日，社会大众对肺癌仍有很多误解。这不仅使很多患者延误了诊断和治疗，其中一些误解还可能会使肺癌患者生活在“羞耻感”的阴影下。
今天小罗就来带大家看一看，这些误解背后的真相是什么。
（提示：向左滑动“误解”，查看“真相”）
以上这些关于肺癌的小知识，有没有也帮你消除以往对肺癌的一些误解呢？11月是全球肺癌关注月，让我们都来关注肺癌，正确认识肺癌，从而更好地守护自己和家人的健康。
参考资料：
1. World HealthOrganization. Cancer Today. Cancer Fact Sheets: Lung Cancer. http://gco.iarc.fr/today/fact-sheets-cancers?cancer=11&type=0&sex=0. AccessedOctober 2017.
2. National CancerInstitute. Surveillance, Epidemiology, and End Results Program. Cancer StatFacts: Lung and Bronchus Cancer. http://seer.cancer.gov/statfacts/html/lungb.html. AccessedOctober 2017.
3. Wao H, MhaskarR, Kumar A, et al. Survival of patients with non-small cell lung cancer withouttreatment: a systematic review and meta-analysis. Systematic Reviews.2013;2:10.
4.NHS. Causes of lung cancer. Availablefrom: http://www.nhs.uk/Conditions/Cancer-of-the-lung/Pages/Causes.aspx
5. Cancer Research UK. Risks and causes.Available from: http://www.cancerresearchuk.org/about-cancer/lung-cancer/risks-causes
6. Kvale PA. Chest. 2006 Jan;129(1Suppl):147S-153S.
7. Cancer Research UK. Symptoms. Availablefrom: http://www.cancerresearchuk.org/about-cancer/lung-cancer/symptoms
8. Yang,P. Semin Respir Crit Care Med. 2011Feb;32(1):10–21.
9. Wong J, et al. Current Oncology.2008;15(5):25–45
10. GLOBOCAN. [Internet, cited 2017 May 11]Available from: http://globocan.iarc.fr/Pages/fact_sheets_cancer.aspx
11. American Cancer Society Key Statisticsfor Lung Cancer. Available from: https://www.cancer.org/cancer/small-cell-lung-cancer/detection-diagnosis-staging/signs-symptoms.html
12. Cancer Research UK. About lung cancer.Available from: http://www.cancerresearchuk.org/about-cancer/lung-cancer/stages-types-grades/types
13. NHS. Treatments. Available from: http://www.nhs.uk/Conditions/Cancer-of-the-lung/Pages/Treatment.aspx
14. SEER. Factsheet. Available from: https://seer.cancer.gov/statfacts/html/lungb.html
15. Cancer Research Institute. What MakesImmunotherapy a Promising Treatment for Lung Cancer? Available from: https://www.cancerresearch.org/we-are-cri/home/cancer-types/lung-cancer