'One in six cancers worldwide are caused by infection'
One in six cancers - two million a year globally - are caused by largely treatable or preventable infections, new estimates suggest.
The Lancet Infectious Diseases review, which looked at incidence rates for 27 cancers in 184 countries, found four main infections are responsible.
These four - human papillomaviruses, Helicobacter pylori and hepatitis B and C viruses - account for 1.9m cases of cervical, gut and liver cancers.
Most cases are in the developing world.
The team from the
International Agency for Research on Cancer
says more efforts are needed to tackle these avoidable cases and recognise cancer as a communicable disease.
The proportion of cancers related to infection is about three times higher in parts of the developing world, such as east Asia, than in developed countries like the
- 22.9% versus 7.4%, respectively. ...