Picture of Psoriatic Arthritis
Psoriatic arthritis is a specific condition in which a person has both psoriasis and arthritis. Psoriatic arthritis is an autoimmune disease, meaning that the immune system is misdirected to cause inflammation of one's own tissues. Rarely, a person can have psoriatic arthritis without having skin psoriasis. Moreover, the arthritis can precede the psoriasis by months or years, or present after years of psoriasis.
Reviewed by William C. Shiel Jr., MD, FACP, FACR on December 9, 2009
Image Source: Image courtesy of Hon Pak, M.D. and reprinted with permission from eMedicine.com, 2009
Text: eMedicineHealth: Types of Psoriasis