Expert Video - What are the risk factors for small cell lung cancer (SCLC)?

Being a smoker or smoking in the past may raise a person’s risk of developing small cell lung cancer. Small cell lung cancer is almost exclusive to patients who are current or former smokers. It's very rare for someone who has never smoked to have small cell lung cancer, unlike non-small cell lung cancer which can occur in 15-20% of never smokers.

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