What does medial facet of the patella were some chondral changes of the medial parapatellar region mean?

Early wear. The knee cap (patella) has 3 parts. The medial and lateral facets and the median ridge. Changes in the articular surface indicate wear changes.
Patellar cartilage. The patella is the kneecap. Cartilage is the smooth lining on the back of the kneecap that allows the kneecap to glide effortlessly. When cartilage is abnormal, this is called a chondral change, usually on an MRI or surgical report. Chondral changes may include thinning of the cartilage, or loose and damaged areas of cartilage.