Papule

A papule is a circumscribed, solid elevation of skin with no visible fluid, varying in area from a pinhead to 1 cm.[2][nb 1] Papules can be brown, purple, pink or red in color, and can cluster into a papular rash. They may open when scratched and become infected and crusty.[3] Larger non-blisterform elevated lesions may be termed nodules.

Papule
Fibrous papule of the nose
Pronunciation
  • /ˈpæpjuːl/[1]
SpecialtyDermatology
Papule and plaque

Papules are sometimes associated with other features such as crusts or scales.

Causal diseases

There are many skin diseases which develop papules, such as lichen planus, a skin disease which classically forms polygonal, purple papules.[4]

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See also
  • Pearly penile papules
  • Skin lesion
  • Skin disease
  • List of cutaneous conditions

Footnotes
  1. With regard to the quote "...varying in size from a pinhead to 1cm," depending on which text is referenced, some authors state the cutoff between a papule and a plaque as 0.5cm, not 1cm, while others state an entirely different measurement. Therefore, for this article, the 1cm cutoff is used which is discussed in Andrews' Diseases of the Skin: Clinical Dermatology (see references), a work considered by some dermatologists as an authority on this subject matter. See Lack of Standardization for complete discussion.

References
  1. "Papule definition and meaning - Collins English Dictionary".
  2. James, William; Berger, Timothy; Elston, Dirk (2005) Andrews' Diseases of the Skin: Clinical Dermatology (10th ed.). Saunders. Page 15. ISBN 0-7216-2921-0.
  3. "papule" at Dorland's Medical Dictionary
  4. "Information on Pimple". 1 August 2016.
Classification
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