Problem
Mr. Ward is an 82-year-old man who has been a two pack a day smoker from age 15. He has been recently diagnosed with squamous cell cancer of the right lung.
Identify the etiology for lung cancer. Include both actual and potential risk factors. Identify the risk factor and then if the risk factor is actual or potential. Describe each risk factor using your own words in several sentences. You will need to refer to materials outside of your course e.g., online. Your answer should be limited to five etiologies.