Secondary Lesions (Result From Changes in Primary Lesions)

Loss of Skin Surface

Erosion—Loss of the superficial epidermis; surface is moist but does not bleed. Example: moist area after the rupture of a vesicle, as in chickenpox

Material on the Skin Surface

Crust—The dried residue of serum, pus, or blood. Example: impetigo

Ulcer—A deeper loss of epidermis and dermis; may bleed and scar. Examples: stasis ulcer of venous insufficiency, syphilitic chancre

Scale—A thin flake of exfoliated epidermis. Examples: dandruff, dry skin, psoriasis

Fissure—A linear crack in the skin. Example: athlete's foot

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TABLE 4-1 ■ Basic Types of Skin Lesions (Continued)

Miscellaneous Lesions

Lichenijication—Thickening and roughening of the skin with increased visibility of the normal skin furrows. Example: atopic dermatitis

Atrophy—Thinning of the skin with loss of the normal skin furrows; the skin looks shinier and more translucent than normal. Example: arterial insufficiency

Excoriation—-An abrasion or scratch mark. It may be linear, as illustrated, or rounded, as in a scratched insect bite.

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