Colorado - Lindsey Vonn broke her arm during a crash in training in Colorado and underwent surgery.
The four-time overall World Cup champion has been battered by injuries in recent years and hopes to return to skiing "as soon as possible."
She said on Facebook the wipeout happened on Copper Mountain on Thursday and she had surgery that night in Vail. She posted X-ray pictures of her right arm on her social media accounts.
Vonn sustained three significant breaks near her knee joint during a super-G crash in Andorra late last February. She tried to keep skiing, only to end her season a few days later. At the time, she was thinking long term - toward the 2017 world championships in St. Moritz, Switzerland, and the 2018 Winter Olympics in South Korea.
The 32-year-old Vonn has been steadily healing and was tentatively hoping to be back for the World Cup races in Lake Louise, Alberta, in early December. There's no timetable for her return after her latest crash.
"While I am beyond frustrated by this latest setback, at least my knees are OK and I will return to the slopes as soon as possible, as I always do!" Vonn posted on Facebook.
Over the years, Vonn's list of injuries has been long. She hurt her knee in training and missed two races at the 2007 worlds. She also raced with a severely bruised shin at the 2010 Vancouver Olympics when she won the downhill. But she couldn't defend her crown four years later in Sochi because of a serious knee injury.
She broke her left ankle in New Zealand during training camp before last season. In November 2015, Vonn needed stitches in her right thumb after trying to break up a fight between her dogs over a Frisbee.
Through all the adversity, Vonn became the winningest female World Cup racer with 76 victories. She has closed the gap on the career mark of 86 victories by Ingemar Stenmark of Sweden.
This fall, Vonn has made the rounds promoting her new book, "Strong is the New Beautiful," which provides tips in such areas as strength, fitness, food and attitude.
Yesterday started off well but ended badly. ??I crashed while training in Copper and badly fractured my humerus. I had surgery in Vail last night and everyone took great care of me. I will work my hardest to be back on the slopes as soon as I can, as I always do. Thanks for all of your continued support?? #NeverGiveUp