Breast cancer mole link

A French study followed 89,000 women aged 40–65 years at the beginning of the study for 18 years, while US research followed almost 74,000 women from the Nurses’ Health Study for 24 years.

Both found an association between those with a high number of melanocytic or cutaneous naevi – defined in the US study as more than 15 on one arm – and the risk of developing breast cancer.

The US study found women with higher levels of oestrogen had more moles, while the