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Lesions

TermDefinition
Macule A color change, flat and circumscribed, less than 1cm
Patch Macules greater than 1cm
Nodule Solid elevated, hard or soft spot. May extend deeper into dermis. Greater than 1cm.
Tumor Larger than a few centimeters in diameter. Firm or soft. Deeper into dermis. Benign or malignant.
Papule Superficial thickening in epidermis, elevated. Less than 1cm
Plaque Papule coalesce to form surface elevation wider than 1cm. Plateau like disc shaped lesion.
Wheal Superficial, raised, transient, erythematous slightl irregular shape from edema
Urticaria Wheals coalesce to form extensive reaction, intensely pruritic
Vesicle Elevated cavity containing free fluid. Less than 1cm Clear serum flows if wall is ruptured
Bulla Larger than 1cm. Unilocular chamber. Superficial in epidermis. Thin-walled and ruptures easily
Cyst Encapsulated fluid-filled cavity in dermis or subcutaneous layer. Tensely elevating skin.
Pustule Turbid fluid in cavity, circumscribed and elevated
Crust Thickened, dried-out exudate left when vesicles/pustules burst or dry up.
Scale Compact, desiccated flakes of skin, dry or greasy, silvery or white, from shedding of dead excess keratin cells.
Fissure Linear crack with abrupt edges, extends into dermis.
Erosion Scooped-out but shallow depression. Superficial, epidermis loss. Heals without scar
Ulcer Deeper depression extending into dermis. Irregular shape. Leaves scar.
Scar After a skin lesion is repaired, normal tissue is lost and replaced with connective tissue.
Atrophic Scar Resulting skin level is depressed with loss of tissue, a thing epidermis
Lichenification Prolonged, intense scratching eventually thickens skin and produces tight,y packed set of papule. Moss like
Keloid Benign excess of scar tissue beyond site original injury.
Excoriation Self-inflicted abrasion, superficial, can be crusted
Petechiae Tiny punctuate hemorrhage. 1-3mm. Non-blanchable
Purpura Confluence/extensive patch of petechiae and ecchymosis. Greater than 3mm
Ecchymosis Purple patch, extravasating of bloom in skin. Greater than 3mm
Created by: Kcarusi
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