Scanzio grew up in the village of Piotta in Leventina and learned to ski in Airolo when he was two . At the age of ten, she started mogul slope racing. Since the Swiss Ski Association did not support her sport at the time, she started for Italy. From February 2002 she took part in the Europa Cup. She made her World Cup debut on December 1, 2002 in Tignes , where she reached 33rd place. Scanzio won the first World Cup point two weeks later with 30th place in Madonna di Campiglio . She achieved her first top 10 placement on February 25, 2005 in Voss . At the 2006 Winter Olympics , she achieved 9th place, the best result of her career to date. In March 2006 she won the silver medal in the Dual Moguls competition at the Junior World Championships.
On February 5, 2007 Scanzio was second in the Moguls competition in La Plagne and was thus on the podium for the first time in the World Cup. At the 2007 World Championships in Madonna di Campiglio, she won the Moguls bronze medal, behind the Canadians Kristi Richards and Jennifer Heil . In the winter of 2007/08 she finished second in the World Cup twice, which resulted in ninth place in the Moguls discipline. In 2009 and 2010 she got several placements among the top ten, at the 2010 Olympic Winter Games she was classified as tenth. In the 2010/11 season , two more top-10 finishes added.
After two solid winters, Scanzio approached the world's best again in the 2013/14 season . She qualified for the 2014 Winter Olympics , where she finished eleventh. At the end of the season, she decided to start for Switzerland. In ten World Cup appearances in the 2014/15 season , she made it into the top 10 seven times and at the 2015 World Championships she was seventh in the Moguls competition. After a rather subdued start to the 2015/16 season , she achieved her only World Cup victory to date in the dual moguls competition in Tazawako on February 28, 2016 . In the 2016/17 World Cup season , Scanzio was only able to make it into the top ten once. On the other hand, she made it to 6th place (Dual Moguls) and 8th place (Moguls) at the 2017 World Championships .