2.2 Crust

Sinonimi

Crust.

Definition/Description

Surface deposits of dried secretions (serum, pus or blood), usually mixed with epithelial and sometimes bacterial debris.


Color: yellow (serum, pus), brown-black (blood).


Size: several mm to cm.

Localization

May appear anywhere on body, usually localized.

Course

May develop into erosion or ulcer.


Associated with vesicle or pustule.


When crusts become detached, the base may be dry or red and moist.

Typical Dermatoses

All diagnoses associated with exudation of fluids.

Pathophysiology

Exudation of serum; leakage of blood following trauma, lesion type following papule, pustule, plaque, vesicle and bulla.

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