Radiotherapy used to treat brain tumours may lead to a decline in mental function many years down the line, say Dutch researchers.
A study of 65 patients, 12 years after they were treated, found those who had radiotherapy were more likely to have problems with memory and attention.
Writing in The Lancet Neurology, the researchers said doctors should hold off using radiotherapy where possible.
One UK expert said doctors were cautious about using radiotherapy.
The patients in the study all had a form of brain tumour called a low-grade glioma - one of the most common types of brain tumour.
In these cases radiotherapy is commonly given after initial surgery to remove the tumour, but there is some debate about whether this should be done immediately or used only if the cancer returns.Read more....
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