Crust (dermatology)

Pustule
Other names: Scab[1]
Crust
SpecialtyDermatology
SymptomsDry fluid on skin[1]
CausesPemphigus vulgaris,[2] impetigo,[3] scabies[4]
Diagnostic methodVisualisation[1]

Crust, also known as a scab, is dry fluid on skin.[1] The fluid generally comprises of dried serum, blood or pus, and is mixed with skin cells and sometimes bacterial debris.[1] Bloody crust may appear red, purple or black.[5] Moist red skin is typically revealed when the crust falls off.[1]

Conditions that produce crust include and pemphigus vulgaris,[2] impetigo,[3] and scabies.[4]

  • Impetigo with crusts
    Impetigo with crusts
  • Crusted scabies
    Crusted scabies
  • Crusted facial acne
    Crusted facial acne
  • Crusted eczema
    Crusted eczema
  • Crusted squamous cell carcinoma
    Crusted squamous cell carcinoma
  • Pemphigus with crusts
    Pemphigus with crusts
  • Botryomycosis
    Botryomycosis

See also

References

  1. 1 2 3 4 5 6 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.). Edinburgh: Elsevier. p. 13. ISBN 978-0-323-54753-6. Archived from the original on 2023-02-09. Retrieved 2023-02-09.
  2. 1 2 Morris-Jones, Rachael (2019). "1. Introduction". In Morris-Jones, Rachael (ed.). ABC of Dermatology (7th ed.). Hoboken: Wiley Blackwell. pp. 4–6. ISBN 978-1-119-48899-6. Archived from the original on 2023-02-09. Retrieved 2023-02-09.
  3. 1 2 Benedetti, Julia (December 2021). "Description of Skin Lesions - Dermatologic Disorders". MSD Manual Professional Edition. Archived from the original on 15 April 2022. Retrieved 15 May 2022.
  4. 1 2 Morris-Jones, Rachael (2019). "15. HIV and skin". In Morris-Jones, Rachael (ed.). ABC of Dermatology (7th ed.). Hoboken: Wiley Blackwell. pp. 128–129. ISBN 978-1-119-48899-6. Archived from the original on 2023-02-09. Retrieved 2023-02-09.
  5. ↑ Oakley, Amanda. "Terminology in dermatology | DermNet NZ". dermnetnz.org. Archived from the original on 9 March 2022. Retrieved 15 May 2022.
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