Terminology Flashcards
Primary lesion
Caused directly by disease process
Macule
Flat
Patch
Flat > .5 cm
Papule / pustule
Raised, domed,
Nodule
Raised, domed, > .5 cm
Papule
Raised, flat top,
Plaque
Raised, flat-top, > .5 cm
Vesicle
Blister (fluid filled)
Bulla
Blister (fluid filled) > .5 cm
Erosion
Denudation of epidermis only
Non-scarring
Ulcer
Denudation of epidermis and dermis
Scarring
Wheal
Edematous, transient, flat-topped plaque
Typical of urticaria (hives)
Center may appear lighter than edge
Secondary Features
Changes due to external factors, such as scratching, trauma, infection, or healing
Scale
Thickening of stratum corneum Adherent White / fine (typical of xerosis) Yellow / greasy (typical of seborrheic dermatitis) Hyperkeratotic
Crust
Dried endogenous material
May be serous (common in eczema), hemorrhagic, or honey-colored (impetigo)
Excoriation
Linear erosions from scratching
Lichenification
Thickening of skin w/ accentuation of skin markings (ridged surface) due to chronic scratching / rubbing
Fissure
Linear crack in skin
Petechiae
Pinpoint red-brown macules due to intradermal hemorrhage. Non-blanching.