@Kathy0427 I had a Baker's Cyst behind my knee with my first tkr. It was also identified before surgery and was not removed during. I had a lot of issues with pain behind my knee which I feel hindered my progress. Now, eventually things got better, but it took about 14 months before my pain had resolved. My surgery this time was 2 days before yours and my nights are also still hard but little by little it is getting better. I see the surgeon next Thursday. It will be interesting to see what he has to say.