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Skin Lesions
Table 27-1
13
Pathology
Graduate
02/15/2011

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Term
Macule
Definition
Small, flat, circumscribed lesion of a different color than the normal skin
Term
Papule
Definition
Small, firm, elevated lesion
Term
Nodule
Definition
Palpable elevated lesion; varies in size
Term
Pustule
Definition
Elevated, erthematous lesion, usually containing purulent exudate
Term
Vesicle
Definition
Elevated, thin-walled lesion containing clear fluid (blister
Term
Plaque
Definition
Large, slightly elevated lesion with flat surface, often topped by scale
Term
Crust
Definition
Dry, rough surface or died exudate or blood
Term
Lichenification
Definition
thick, dry, rough surface (leather-like)
Term
Keloid
Definition
raised, irregular and increased mass of collage resulting fro excessive scar tissue formation
Term
Fissure
Definition
small, deep, linear crack or tear in skin
Term
Ulcer
Definition
cavity with loss of tissue from epidermis and dermis; often weeping or bleeding
Term
Erosion
Definition
Shallow, moist cavity in epidermis
Term
Comedone
Definition
mass of sebum, keratin and debris blocking the opening of a hair follicle
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