The only other time this was attempted was in the Dominican Republic, where doctors operated on 8-week-old Rebecca Martinez who was also born with a parasitic head. Sadly, she did not survive.
After months of preparation, the team of surgeons worked seven hours straight to carefully separate Manar from the undeveloped twin. The most critical part of the operation was the actual separation of the two brains, which took another two hours. If not done properly, Manar would die.