A 50-year-old male with a 30-year history of smoking was diagnosed with lung cancer. He was previously exposed to air pollution, asbestos, and radiation at his job. Which of the following most likely had the greatest impact on development of his cancer?

Question

Quizplus · Accepted Answer

The most likely cause of this patient's lung cancer is cigarette smoke, as he has a 30-year history of smoking. While exposure to air pollution, asbestos, and radiation at his job may have also contributed to his cancer, smoking is the most significant risk factor for lung cancer.

A 50-Year-Old Male with a 30-Year History of Smoking Was