Derm /HP spring 2006 SFU
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| Circumscribed flat, non palpable changes in skin color. Small flat spot, up to 1.0 CM. Example: freckle, petechia | Maculae: Woods
Macule:Bates
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| Circumscribed, flat non palpable changes in skin color. Flat spot, 1.0CM or larger | Patch
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| Circumscribed superficial elevation of skin formed by free fluid in a cavity within the skin layers, up to 1.0 cm; filled with serous fluid. Example: herpes simplex | Vesicle
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| Circumscribed superficial elevations of the skin formed by free fluid in a cavity, within the skin layer, 1.0CM or larger. Example second-degree burn | Bulla
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| Circumscribed superficial elevation filled with pus. Example: acne , impetigo | Pustule
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| A flake of exfoliated epidermis. example: dandruff, dry skin, psoriasis | scale
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| Linear crack in the skin. Example: athlete's foot | Fissure
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| Palpable elevated solid mass up to 1.0 cm, example elevated Nevis | Papule
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| Elevated superficial lesion, palpable ,1.0 cm or larger . Often for my coalescence of papules | Plaque
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| Marblel ike lesion larger than 0.5 cm. Often deeper and firmer than papule. | Nodule
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| Palpable, elevated solid mass, somewhat irregular relative to the transient superficial area of localized skin edema. Examples: insect bite, hives | Weal
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| Loss of superficial epidermis; surface is moist but does not bleed. Example: ruptured chickenpox | Erosion
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| Dried residue of serum, plus, or blood. Example impetigo | Crust
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| Deep loss of epidermis or dermis; may bleed and scar, examples: Stasis ulcer on venous insufficiency, syphilitic chancre | Ulcer
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| Thickening and roughing of the skin that with increased visibility of the normal skin furrows example: atopic dermatitis | lichenification
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| Thinning of the skin with loss of the normal skin furrows, the skin looks shinier and more translucent than normal. Example arterial insufficiency | Atrophy
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| And abrasion or scratch mark, it may be linear, or rounded as in a scratched insect bite. | Excoriation
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| Replacement of destroyed tissue by fibrous tissue. May be thick and pink:hypertrophic. May be thin and white a hypotrophic but does not extend beyond the injured area. | Scar
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