Scientists say they have a near-perfect picture of the genetic events that cause breast cancer.

Researchers at University College, London have developed a way of finding unique markings within a tumour - its "Achilles heel" - allowing the body to target the disease.

Having more than 11 moles on one arm indicates a higher-than-average risk of skin cancer or melanoma, research suggests.

A cheap and safe drug could help half of women with breast cancer to live longer, scientists suggest.