Skin plaque

Plaque
Plaque in chronic plaque psoriasis
SpecialtyDermatology
SymptomsWide raised lesion of skin or merger of multiple small bumps in the skin[1]

A plaque is a thickened area of skin resulting from a merger of many small bumps.[1][2] It is typically larger than 1cm and feels different to surrounding skin.[3][4] It may be flat-topped or rounded, is slightly elevated and may have a slight dip in the centre.[1][3] It is generally well defined, but can have a blurred border.[5] Plaques may be ring-shaped, half-moon shaped, have multiple sides, shaped like a snake, or have a mixed colour with varied appearance.[5]

Definition

Papule and plaque

A plaque is a flat, thickened area of skin resulting from a merger of many small bumps.[1] The term originates from the French word for plate.[2]

They can be of various shapes; annular, arcuate, polygonal, polymorphic, serpiginous, or poikilodermatous.[2]

Signs and symptoms

Reference

  1. 1 2 3 4 James, William D.; Elston, Dirk; Treat, James R.; Rosenbach, Misha A.; Neuhaus, Isaac (2020). "2. Cutaneous signs and diagnosis". Andrews' Diseases of the Skin: Clinical Dermatology (13th ed.). Elsevier. p. 11. ISBN 978-0-323-54753-6.
  2. 1 2 3 "Terminology in dermatology". dermnetnz.org. Archived from the original on 9 March 2022. Retrieved 29 March 2023.
  3. 1 2 "Description of Skin Lesions - Dermatologic Disorders". MSD Manual Professional Edition. Archived from the original on 15 April 2022. Retrieved 14 August 2022.
  4. ↑ Langlais, Robert P.; Miller, Craig S.; Gehrig, Jill S. (2017). "18. Diagnostic and descritive terminology: macule, patch, erosion, ulcer". Color Atlas of Common Oral Diseases, Enhanced Edition (5th ed.). Burlington: Jones & Bartlett Learning. p. 22. ISBN 978-1-284-24098-6. Archived from the original on 2023-07-02. Retrieved 2023-06-11.
  5. 1 2 Oakley, Amanda. "Terminology in dermatology". dermnetnz.org. Archived from the original on 9 March 2022. Retrieved 16 April 2022.
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