MARSEILLE, France – French doctors have successfully separated twins joined at the spine, the first operation of its kind in France, hospital officials said Wednesday. Fifteen-month-olds named Mohamed and Souleymane were successfully separated Dec. 15. Similar operations have previously been performed in Britain, South Africa and Canada, the surgeons said. “As soon as they woke up on the operating table, the twins moved their legs and their feet. Today, their prognosis is good,” said doctor Gabriel Lena, head of the pediatric neurosurgery division of the La Timone hospital. The twins were born prematurely at 26 weeks, weighing just 1.7 pounds each and fused at the base of the spine. Diagnosed as Siamese twins before birth, they were kept in the hospital until they were old enough to be operated on. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! AD Quality Auto 360p 720p 1080p Top articles1/5READ MORERose Parade grand marshal Rita Moreno talks New Year’s Day outfit and ‘West Side Story’ remake The main risks of the operation were paralysis of the lower limbs or infection leading to potentially deadly meningitis. Surgeons said they made sure they had enough skin to cover the wound left by the operation by inserting inflatable balloons under the twins’ skin five weeks before the operation. Mohamed and Souleymane were recovering together and should have normal childhoods, doctors predicted. Their parents wanted to remain anonymous.