Psoriasis

Last reviewed: 27 Apr 2022
Last updated: 21 Dec 2021

Summary

Definition

History and exam

Key diagnostic factors

  • skin lesions
More key diagnostic factors

Other diagnostic factors

  • family history
  • joint swelling or pain
Other diagnostic factors

Risk factors

  • genetic
  • infection
  • local trauma
  • medications
  • stress
  • smoking
  • ethnicity
  • alcohol
  • greater body mass index (BMI)
More risk factors

Diagnostic investigations

1st investigations to order

  • clinical diagnosis
More 1st investigations to order

Investigations to consider

  • skin biopsy
More investigations to consider

Treatment algorithm

ONGOING

plaque

guttate

pustular

Contributors

Authors

Andrea Chiricozzi, MD

Assistant Professor

University of Pisa

Consultant Dermatologist

University Hospital of Pisa

Pisa

Italy

Disclosures

AC has served as an advisory board member and consultant and has received fees and speaker's honoraria or has participated in clinical trials for AbbVie, Almirall, Biogen, Fresenius Kabi, Leo Pharma, Lilly, Janssen, Novartis, Sanofi Genzyme, and UCB Pharma; AC is also an author of a reference cited in this topic.

Acknowledgements

Dr Andrea Chiricozzi would like to gratefully acknowledge Dr April W. Armstrong and Dr Tsu-Yi Chuang, previous contributors to this topic.

Disclosures

TC declares that he has no competing interests. AWA is an investigator and consultant for Abbott, Amgen, and Janssen; AWA is also an author of references cited in this topic.

Peer reviewers

David Burden, MD, FRCP

Western Infirmary, Glasgow

Consultant Dermatologist Dermatology

Glasgow

UK

Disclosures

DB has been reimbursed as a consultant, researcher, and lecturer for Abbott, Leo, Pfizer, Merck, Janssen-Cilag, and Novartis.

Paradi Mirmirani, MD

Physician

Department of Dermatology

Kaiser Permanente Vallejo Medical Center

Vallejo

CA

Disclosures

PM declares that she has no competing interests.

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