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LESION SHAPES:
Round/Oval
Solid appearance - no central clearing
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LESION SHAPES:
Annular
Round with central clearing (tinea corporis)
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LESION SHAPES:
Iris
Pink macule with purple concentric ring (erythema multiforme)
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LESION SHAPES:
Gyrate
Snakelike appearance
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SECONDARY LESION
Scale
Heaped-up keratinized cells; flaky skin; irregular; thick or think; dray or oily; variation in size
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Flaking of skin with seborrheic dermatitis following scarlet fever, or flaking of skin following a drug reaction; dry skin, pity-riasis rosea, eczema, xerosis
Secondary skin lesion: scale
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SECONDARY LESION
Lichenification
Rough, thickened epidermis secondary to persistent rubbing, itching, or skin irritation; often involves flexor surface of extremity
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Chronic dermatitis
Lichenification
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SECONDARY LESION:
Keloid
Irregular-shaped, elevated, progressively enlarging scar; grows beyond the boundaries of the wound
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SECONDARY LESION:
Scar
Thin to thick fibrous tissue that replaces normal skin following injury or laceration to the dermis
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Healed wound or surgical incision
Secondary Lesion: scar
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SECONDARY LESION:
Excoriation
Loss of the epidermis; linear hollowed out crusted area
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Abrasion or scratch, scabies
Secondary lesion: excoriation
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SECONDARY LESION:
Fissure
Linear crack or break from the epidermis to the dermis; may be moist or dry
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Athlete's foot, cracks at the corner of the mouth, chapped hands, eczema, intertrigo labialis
Secondary lesion: fissure
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SECONDARY LESION:
Crust
Dried drainage or blood; slightly elevated; variable size; colors variabled (black, tan, mixed)
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scab on abrasion, eczema
Secondary lesion: crust
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SECONDARY LESION:
Erosion
Loss of part of the epidermis; depressed, moist, glistening; follows rupture of a vesicle or bulla
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varicella, variola after rupture, candidiasis, herpes simplex
Secondary lesion: erosion
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SECONDARY LESION:
Ulcer
Loss of epidermis and dermis; concave; varies in size
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Pressure ulcer, stasis ulcers, syphilis chancre
Secondary lesion: ulcer
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SECONDARY LESION:
ATROPHY
Thinning of the skin surface and loss of skin markings; skin appears translucent and paper-like
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Aged skin, striae, discoid lupus erythema-tosus
Secondary lesion: atrophy
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PRIMARY LESION:
Macule
A flat, circumscribed area that is a change in the color of the skin; less than 1 cm in diameter
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Freckles, flat moles (nevi), petechiae, measles, scarlet fever
Primary lesion: Macule
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PRIMARY LESION:
Papule
An elevated, firm, circumscribed area less than 1 cm in diamter
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Wart (verruca), elevated moles, lichen planus, cherry angioma, skin tag
Primary lesion: papules
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PRIMARY LESION:
Patch
A flat, nonpalpable, irregular-shaped macule more than 1 cm in diameter
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Vitiligo, port wine stains, mongolian spots, cafe-au-lait spots
Primary lesion: patch
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PRIMARY LESION:
Plaque
Elevated, firm, and rough lesion with flat top surface greater than 1 cm in diameter
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Psoriasis, seborrheic and actinic kerato-ses, eczema
Primary lesion: plaque
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PRIMARY LESION:
Wheal
Elevated irregular-shpaed area of cutaneous edema; solid, transient; variable diameter
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Insect bites, urticaria, allergic reaction, lu-pus erythematosus
Primary lesion: wheal
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PRIMARY LESION:
Nodule
Elevated, firm, curcumscribed lesion; deeper in dermis than a papule; 1-2 cm in diameter
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Dermatofiroma erythema nodosum, liponmas, melanoma, hemangioma, neuro-fibroma
primary lesion: nodules
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PRIMARY LESIONS:
Tumor
Elevated and solid lesion; may or may not be clearly demarcated; deeper in dermis; greater than 2cm in diameter
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Neoplasms, lipoma, hemangioma
primary lesion: tumors
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PRIMARY LESION:
Vesicle
Elevated, circumscribed, superficial, not into the dermis; filled with serous fluid; less than 1 cm in diameter
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varicella (chickenpox), herpes zoster (shingles), impetigo, acute eczema
primary lesion: vesicle
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PRIMARY LESION:
Bulla
Vesicle greater than 1 cm in diameter
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Blister, pemphigus vulgaris, lupus, erythematosus, impetigo, drug reaction
primary lesion: bulla
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PRIMARY LESION:
Pustule
Elevated, superficial lesion; similar to a vesicle but filled with purulent fluid
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Impetigo, acne, folliculitis, herpes simplex
primary lesion: pustule
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PRIMARY LESION:
Cyst
Elevated, circumscribed, encapsulated lesion; in dermis or subQ layer; filled with liquid or semisolid material
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sebaceous cyst, cystic acne
primary lesion: cysts
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