Longer life spans combined with risk factors such as alcohol and tobacco use, physical inactivity and obesity, are behind a rise in cancer cases in low- and middle-income countries, the World Health Organization (WHO) warns.

The UN agency estimates rates in these regions could jump by as much as 70 per cent over the next 15 years unless action is taken.

WHO is highlighting the importance of early detection ahead of World Cancer Day, observed this Sunday, 4 February.

Bronwen Cowley in Geneva has been speaking to WHO Technical Officer, Dr André Ilbawi.