Plaque (Dermatology)

Plaque
Plaque
	Plaque in chronic plaque psoriasis
Specialty	Dermatology
Symptoms	Wide raised lesion of skin or merger of multiple small bumps in the skin

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]

Conditions presenting with plaques include psoriasis, nummular dermatitis, and lichen simplex chronicus.^[6]

Definition[edit | edit source]

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[edit | edit source]

Chronic plaque psoriasis
Milia-en-plaque
Plaque - mycosis fungoides
Plaque in mouth - lichen planus
Purplish polygonal plaques in lichen planus
Granuloma annulare
Lichen planus
Mycosis fungoides
Polymorphic eruption of pregnancy

Reference[edit | edit source]

↑ ^1.0 ^1.1 ^1.2 ^1.3 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.
↑ ^2.0 ^2.1 ^2.2 "Terminology in dermatology". dermnetnz.org. Archived from the original on 9 March 2022. Retrieved 29 March 2023.
↑ ^3.0 ^3.1 "Description of Skin Lesions - Dermatologic Disorders". MSD Manual Professional Edition. Archived from the original on 15 April 2022. Retrieved 14 August 2022.
↑ 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.
↑ ^5.0 ^5.1 Oakley, Amanda. "Terminology in dermatology". dermnetnz.org. Archived from the original on 9 March 2022. Retrieved 16 April 2022.
↑ Bolognia, Jean L.; Schaffer, Julie V.; Duncan, Karynne O.; Ko, Christine (2022). "1. Basics". Dermatology Essentials (2nd ed.). Elsevier. p. 5. ISBN 978-0-323-70971-2. Archived from the original on 2024-02-12. Retrieved 2024-02-12.

External links[edit | edit source]

Diseases Database (DDB): 29379

[Andrews2020-1] 1.0 ^1.1 ^1.2 ^1.3 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.

[DermNet-2] 2.0 ^2.1 ^2.2 "Terminology in dermatology". dermnetnz.org. Archived from the original on 9 March 2022. Retrieved 29 March 2023.

[MSD-3] 3.0 ^3.1 "Description of Skin Lesions - Dermatologic Disorders". MSD Manual Professional Edition. Archived from the original on 15 April 2022. Retrieved 14 August 2022.

[Langlais2017-4] 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.

[DermNetNZ-5] 5.0 ^5.1 Oakley, Amanda. "Terminology in dermatology". dermnetnz.org. Archived from the original on 9 March 2022. Retrieved 16 April 2022.

[Bolog2022-6] Bolognia, Jean L.; Schaffer, Julie V.; Duncan, Karynne O.; Ko, Christine (2022). "1. Basics". Dermatology Essentials (2nd ed.). Elsevier. p. 5. ISBN 978-0-323-70971-2. Archived from the original on 2024-02-12. Retrieved 2024-02-12.

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Plaque (Dermatology)

Contents

Definition[edit | edit source]

Signs and symptoms[edit | edit source]

See also[edit | edit source]

Reference[edit | edit source]

External links[edit | edit source]