What are the 5 typical patterns of joint involvement in psoriatic arthritis?
- Asymmetric oligoarthritis
(“Oligo” means that fewer than five joints are involved) - Symmetric polyarthritis
(Sometimes indistinguishable from rheumatoid arthritis) - Symmetric arthritis with distal interphalangeal joint predominance
- Arthritis mutilans
(A particularly deforming subset of the disease) - Spondyloarthritis
