Does radon exposure increase skin cancer risk?

Radon and its progeny can cause lung cancer. This association has first been observed in studies on underground miners exposed to high radon concentrations. Later studies on the general population have provided convincing evidence that long-term residential radon exposure also increases the risk of lung cancer. Up to now, other health effects of radon have not been consistently demonstrated. Recently, scientists from the Swiss Tropical and Public Health Institute (Swiss TPH) found a statistically significant association between mortality from malignant melanoma and radon exposure at the place of residence (Vienneau et al. 2017). They claimed that their study "supports the hypothesis that radon exposure is a relevant risk factor for skin cancer" independent of UV exposure which was also modelled in their study.