I have "Small focus of medial facet retropatellar chondral fissuring and basal chrondral delamination" this is caused by the concrete floors at my work and the constant kneeling, squatting, climbing ladders etc... I'm essentially a cripple on a bad day.
Worst part about this is, I made a claim to my work about it, and ever since they've been doing EVERY THING in their power to try and fire me, each week they get closer and closer to it, I sneeze in the wrong direction and they investigate it. The Area manager told the Assistant Manager today "I won't stop until I get him!". It's ridiculous and i'm not qualified to do anything else.