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secondary lesion
term | definition | examples |
---|---|---|
scale | dried fragments of sloughed epidermal cells, irregular in shape and size and white, tan, yellow, or silver in color | dandruff, dry skin, or psoriasis |
crust | dried serum, sebum, blood, or pus on skin surface producing a temporary barrier to the environment | impetigo |
erosion | a moist, demarcated, depressed area due to loss of partial or full thickness epidermis. basal layer of epidermis remains intact | ruptured chickenpox or vesicle |
ulcer | irregularly shaped, exudative, depressed lesion in which entire epidermis and all or part of dermis are lost. results from trauma and tissue destruction | pressure ulcer |
scar | mark left on skin after healing. Replacement of destroyed tissue by scar tissue | (blank) |
lichenification | epidermal thickening resulting in elevated plaque with accentuated skin markings. Usually results from repeated injury through rubbing or scratching | chronic atopic dermatitis |
excoriation | superficial, linear abrasion of epidermis. visible sign of itching caused by rubbing or scratching | atopic dermatitis |
fissure | deep linear split through epidermis into dermis | tinea pedis |
atrophy | wasting of epidermis in which skin appears thin and transparent, or of dermis in which there is a depressed area | arterial insufficiency |