Papule

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Papule and Plaque
Fibrous papule of the nose

A papule is a circumscribed, solid elevation of skin with no visible fluid, varying in size from a pinhead to 1 cm.[1][nb 1] They can be brown, purple, pink or red in color, and can cluster into a papular rash. The papules may open when scratched and become infected and crusty.[2]

Papules may have different shapes and are sometimes associated with other features such as crusts or scales.

Diseases of the skin that develop papules[edit]

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

See also[edit]

Footnotes[edit]

  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[edit]

  1. ^ James, William; Berger, Timothy; Elston, Dirk (2005) Andrews' Diseases of the Skin: Clinical Dermatology (10th ed.). Saunders. Page 15. ISBN 0-7216-2921-0.
  2. ^ "papule" at Dorland's Medical Dictionary