Harvard Women's Health Watch

By the way, doctor: Do mold spores cause lung cancer?

Q. An article on lung cancer mentioned "certain other airborne substances" as risk factors. What about mold spores?

A. Your question is a good one. Mold or fungal spores can cause certain lung disorders, including infections (pneumonia), allergic reactions (rhinitis or asthma), and reactions in which the body's immune system attacks lung cells, causing inflammation (pneumonitis). Mold spores also produce toxins (mycotoxins) that can affect the lungs, skin, and nervous system. But we have no definitive evidence linking them to specific diseases — and no evidence that mold spores cause lung cancer.

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