A LINK between early-onset dementia and playing rugby has been discovered by a Scottish brain injuries expert.

Dr Willie Stewart, a consultant at Glasgow's Southern General Hospital, said high-impact sports are starting to lead to problems later in life usually associated with former boxers.

He examined brain tissue for abnormal proteins usually associated with head injuries and dementia. A former rugby player was found to have higher levels of the protein than a retired amateur boxer with dementia pugilistica or punch-drunk syndrome.

Stewart said: "If we say it's 1% of people playing at international rugby level, then in any Six Nations weekend that's one or two players who could go on to develop a dementia they wouldn't otherwise have been exposed to."