[HIGHLIGHTS] Long-term consequences of collisions: Doctors detect brain disease CTE in deceased rugby professional

Former rugby professional Billy Guyton was posthumously diagnosed with chronic brain injury CTE. CTE stands for chronic traumatic encephalopathy.

It is thought to be caused by concussions or repeated collisions to the head. Such collisions are common in rugby, as well as in American football, where CTE has been a big issue for years. The risk of CTE for rugby players increases by 14 percent with each year of their career, in football, the risk increases by 25 to 30 percent.