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Dr. Denis Marcellin-Little operates on a cat named Cyrano at North Carolina State University in Raleigh, N.C., on Thursday, Jan. 26, 2012. The 10-year-old tabby is believed to be the nation's first recipient of a feline total-knee replacement. (AP Photo/Allen Breed)

Fat cat gets revolutionary new knee joint

Because Cyrano weighs more than 20 pounds, amputating his cancer-weakened leg was out of the question. On Jan. 26, the 10-year-old tabby from Upperville, Va., received what doctors believe is the first feline total knee replacement in the U.S.