The woman, now 68, needed her other knee replaced and wanted him to do it.

"Sir, we will have those knees replaced within the hour," he said.

He eventually had both knees replaced at age 65.

My father, rejecting Nancy's advice, had seized on her absence as an opportunity to have his knee replaced.

"It's very hard to micromanage when you have your two knees replaced."

I'm still glad I chose to have both knees replaced at the same time.

When Olga had her knees replaced, she used a morphine pump for the pain, but not this time.

He had his left knee replaced in October.

I feel like I'm too young to have my knee replaced.

She had both hips replaced more than 10 years ago, and a knee replaced last year.