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skin lesions

macule flat, circumscribed area that is a change in color of skin; less than 1 cm (freckle)
papule elevated, firm, circumscribed area less than 1 cm (wart, moles)
patch flat, nonpalpable, irregular-shaped macule more than 1 cm (vitiligo)
plaque elevated, firm, and rough lesion with flat top surface more than 1 cm (psorasis)
wheal elevated irrefular-shaped area of cutaneous edem; solid, transient, variable size (insect bite, allergic reaction)
tumor elevated, solid lesion; may be clearly demarcated; deeper in dermiss; more than 2 cm
nodule elevated, firm, circumscribed lesion; deeper in dermis that papule; 1-2 cm (erythema nodosum)
vesicle elevated, circumscribed, superficial, not into dermis; filled with serous fluid; less than 1 cm (varicella)
bulla vesicle more than 1 cm (blister)
pustule elevated, superficial lesion; similar to a vesicle but filled with purulent fluid (acne)
cyst elevated, circumscribed encapsulated lesion; in dermis or subcutaneous layer; filled with liquid or semisolid material
telangiectasia fine, irregular red lines produced by capillary dilation; can be associated with acne rosacea, venous hypertension, or developmental abnormalities
scale heaped-up keratinized cells; flaky skin; irregular; thick or thin; dry or oily; variation in size
lichenification rough, thickened epidermis secondary to persistent rubbing, pruritus, or skin irritation; often involves flexor surface of extremity (chronic dermatitis)
keloid irregular-shaped, elevated, progressively enlarging scar; grows beyond the boundaries of wound; caused by excessive collagen formation during healing
scar think to thick fibrous tissue that replaces normal skin following injury or laceration to dermis (surgical incision)
exoriation loss of epidermis; linear, hollowed-out crusted area (abrasion, scabies)
fissure linear crack or break from epidermis to dermis; may be moist or dry (athlete's foot)
erosion loss of part of epidermis; depressed, moist, glistening; follows rupture of a vesicle or bulla
ulcer loss of epidermis and dermis; concave; varies in size
atrophy thinning of skin surface and loss of skin markings; skin appears translucent and paper-like (aged skin)
Created by: rachelann_93