I have had right knee chondromalacia - no cartilage behind my kneecap, for 2 1/2 years, as seen on an MRI. The worst part for me was pain with bending the knee and lack of range of motion. After 7 months of PT and 6 weeks of accupuncture it wasn't much better. About a year a half ago I decided to try clinical massage therapy and was lucky enough to find someone great. After only a couple treatments my range of motion improved. Though it is still not 100% it is way better than it was. He also works on my back and hip as they get cranky too. It is not an inexpensive treatment, but you can use Flexible Spending Account if you get that. I would recommend to anyone!
When I bough my bike last year I didn't know how my knee would handle it, but I am sure cycling is helping as well as the massage therapy.
If anyone in the Boston area wants to know who my therapist is just email me!