21.   Howard had to have cancer surgery for a lump in his chest.

22.   He had surgery to correct a facial disfigurement.

23.   He had surgery to remove calcium deposits from his knee.

24.   Dad was a nervous wreck on the day I had my surgery.

25.   He had surgery to remove fibrous scar tissue in his knee.

26.   She had corrective surgery on her knee this past summer.

27.   Is it really necessary for me to have surgery?

28.   He had surgery to open up blockages in his arteries.

29.   Patients with abnormal findings at endoscopy or who had had previous surgery were excluded from the study.

30.   Five patients had had previous surgery of the pancreas.