How is nail psoriasis classified?

Updated: Oct 03, 2019
  • Author: Cindy Li, DO; Chief Editor: William D James, MD  more...
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Answer

Answer

Most people with psoriatic arthritis have nail changes that can be classified as follows (see the images below):

  • Type I - Classic distal interphalangeal joint involvement (5% of patients)

  • Type II - Arthritis mutilans

  • Type III - Symmetric polyarthritis

  • Type IV - Asymmetric oligoarthritis (the most common type of psoriatic arthritis, occurring in 70% of patients)

  • Type V - Ankylosing spondylitis

See the images below.

Classic distal interphalangeal joint involvement i Classic distal interphalangeal joint involvement in psoriatic arthritis.
This patient has extensive psoriasis, nail involve This patient has extensive psoriasis, nail involvement, and joint pain.

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