Noninfective arthritis
Psoriatic arthritis

Author: Vijay Shankar, M.D. (see Authors page)

Revised: 9 July 2018, last major update May 2013

Copyright: (c) 2002-2017,, Inc.

PubMed Search: Psoriatic arthritis [title] joints loattrfree full text[sb]

Cite this page: Shankar, V. Psoriatic arthritis. website. Accessed September 22nd, 2018.
Definition / general
  • Affects 5 - 10% of psoriasis population, usually ages 35 - 45 years
  • Onset or exacerbation may be associated with trauma (Can Fam Physician 2012;58:e636)
  • First affects DIP of hands and feet; similar to rheumatoid arthritis but milder
  • Inflammation of digital tendon sheaths causes sausage fingers
  • Also causes conjunctivitis, iritis
Case reports
Clinical images

Images hosted on other servers:

Psoriasis rash

Swollen and erythematous third digit

Swollen joints

Microscopic (histologic) description
  • Similar to rheumatoid arthritis but tends to be more fibrotic