4. Immune Response
Rheumatoid arthritis is a common medical autoimmune disorder in which the body mistakenly sees its own healthy tissue as a potential dangerous invader. In an attempt to healing it, your body immune system combats the tissues.
It is also a useful system if the said tissue really dangerous, but when it comes to RA, this will result to a clear case of mistaken identity.
This erroneous and uncommon immune response has been directly linked causing skin cancer, but the damaged cells in general are also very vulnerable to other cancer types.