Children 'need more teaching on cancer causes'
Children are unaware of what causes cancer, with a small number believing they can get it from behaving badly, suggests a poll by Macmillan Cancer Support.
The survey of 500 children aged nine to 16-years-old found that 97% do not know that sunburn can cause cancer - although 91% do know smoking causes it.
The charity says the results suggest children are ill-informed about cancer.
Teachers need to educate school children on cancer, it adds.
The children who responded to the poll also do not appear to know what it means to have cancer.
One in five think it is always fatal, while more than half say they do not know what it is.
And 4% even think cancer can be caught from someone else.
Despite this, two-thirds of the children polled know someone who has been diagnosed with cancer, though more than half say the word 'cancer' makes them feel frightened.
Katherine Donnelly from Macmillan Cancer Support said many people, including teachers, think that young children should be protected from talking about cancer.
"In many ways, it's still a bit of a taboo subject. Not all teachers feel confident about talking about it or know where to get the facts and figures from.
"The results showed that as children got older there was a slight increase in the number of those that had been taught about cancer, but not a hugely significant number."
Miss Donnelly added: "As cancer affects more and more people, the chances of children knowing someone with the condition grows - be that their grandparent, parent or friend. This can be really distressing and they may feel too worried to ask questions.
"Just over a quarter of children have been taught about cancer at school and this needs to improve."
The charity has produced an information pack called Talking About Cancer to allow teachers to plan lessons around the subject.