His surgeon says Armstrong's collarbone was broken in four pieces, making the surgery more challenging. Dr. Doug Elenz inserted a steel plate and 12 screws to stabilize the collarbone.
Elenz says the 37-year-old cyclist was in surgery for about three hours Wednesday and must take a few days off before he can resume training on a stationary bike.
Armstong has said he still hopes to ride in the Giro d'Italia in May and the Tour de France in July.

Lance Armstrong of the U.S. is seen in an ambulance as he arrives at Hospital Clinico in Valladolid, Spain, Monday. / photo: Associated Press
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