Senator Nancy Greene Raine, former Canadian Queen of Alpine Skiing, is being treated for thyroid gland cancer, it said.
The senator, aged 73, plans to return to the post as soon as possible after her treatments, it is said.
Nicknamed Tiger for her speed and tightly negotiated slalom turns, Nancy Greene Raine dominated the alpine skiing scene in Canada and the world for two years. She won gold and silver at the 1968 Olympic Games and was crowned champion in 1967 and 1968 in the overall World Cup standings.
In a 1999 Canadian Press survey of the country’s media, Nancy Greene was chosen as the female athlete par excellence of the 20th century.
At the Games in Grenoble in 1968, she won gold in the giant slalom and silver in the slalom as she was still treating an ankle injury suffered a month earlier.
She ended her career in 1968, at the age of 24, after winning 13 wins in two years at the World Cup.
Nancy Greene Raine was appointed to the Senate in 2009 by Conservative Prime Minister Stephen Harper.