Why is rheumatoid arthritis symmetrical?

Related questions

1. What does rheumatoid arthritis feel like in feet?
2. What do RA patients die from?
3. Can Rheumatoid Arthritis be caused by stress?
4. Which is worse osteo or rheumatoid arthritis?
5. Where does RA start?
6. Can Rheumatoid arthritis cause optic neuritis?
7. Which joint is not involved in rheumatoid arthritis?
8. What does rheumatoid arthritis feel like in hands?
9. Is rheumatoid arthritis a pathological condition?
10. Is walking good for arthritis in the feet?

Tags

1. #around
2. #wrists
3. #elbows
4. #inside
5. #hands
6. #synovium
7. #creates
8. #inflammation
9. #resulting
10. #effect
11. #commonly
12. #symmetrical
13. #arthritis
14. #ankles
15. #joints
16. #rheumatoid
17. #lines
18. #usually
19. #knees
20. #causes
21. #thicken
22. #swelling
23. #tissue
24. #joint
25. #affects