Vonn lost control around a right turn in the middle section of the course, got twisted around, landed hard on her left hip and crashed backward into the safety netting.
"The course is breaking up at the bottom," Vonn said, holding ice on her finger, adding that her back and shin were hurting, too. "I got a little bit too inside and lost my outside ski. My knee came up and hit my chin. ... I don't know honestly how I hurt my hand.
"I'm just a little bit beat up right now," added Vonn, who also fell in the slalom leg of the super-combined last week. "Things don't seem to be quite going my way."
Dr. Jim Moeller, chief medical officer for the U.S. Olympic team, said Vonn had a non-displaced fracture of the proximal phalanx of the small finger -- where the pinkie connects to the hand. He said Vonn had not decided if she will race in Friday's final women's event, the slalom.
The second run of the giant slalom was postponed until today because fog made it impossible to see the course.