1.   A Flight Lieutenant underwent surgery to repair a broken blood vessel in the brain.

2.   Before undergoing surgery, patients should discuss the various options with their doctor.

3.   He is due to see a chiropractor tomorrow and is likely to undergo surgery.

4.   He underwent emergency surgery after shards of the bomb tore into his chest and face.

5.   He underwent surgery to remove a bullet from his chest.

6.   If she undergoes surgery, it will take place in a private hospital and will be paid for by Zapatista supporters.

7.   In March he underwent surgery for the cancer.