I went to see a second opinion for left knee pain and was told that i have scar tissue i am wondering why the first surgeon didn't see that? please he

1st opinion ?Poss OK: 2nd orthopedist may not be correct. Assume both looked at same x-ray or MRI stuies. In which case request copy of radiologist report. You can not necessarily rely on orthopedist's interpretation if he/she had studies done in their own office. Rindependent respected radiologist, not connected with either orthopedist could give an unbiased opinion. Alternatively consider a 3rd opinion.