One of the things I love about yoga is that it can be practiced by almost anyone, and can accommodate most ailments or injuries people may be practicing with. If you're suffering from an ailment or injury, it takes a little knowledge and confidence to practice safely, and I wrote this article specifically for people with arthritis. This is also for teachers who need some information about the presentation of the disease so they can help their students.
Check out this article I wrote for Zen Monkey on this topic.