Melbourne, November 16: Australian neurosurgeons have begun a complicated surgery to separate twin sisters who are joined at the top of the head.
The Bangladeshi 3-year-olds, Trishna and Krishna, share parts of their skull, brain tissue and blood flow.
Plastic surgeon Tony Holmes said at the beginning of the operation Monday that the chance of a successful separation was 25 percent.
There is a 50 percent chance that the girls will suffer brain damage and a 25 percent chance that one of the sisters will die.
Surgeons expect the operation to take at least 16 hours.
The orphaned girls were brought to Australia two years ago by the Children First Foundation and have undergone a number of operations already in preparation for separation.
—Agencies