Skin:Lesions Flashcards
circumscribed, flat, nonpalpable change in skin color (up to 1 cm)
macule (freckles, flat nevi)
circumscribed, flat non palpable change in skin color (> 1 cm)
patch(mongolian spot)
Palpable, elevated, circumscribed, solid mass; caused by superficial thickening in epidermis (
Papule(elevated nevus, wart)
flat, elevated surface; often formed by coalescence of papules (> 0.5 cm)
plaque(psoriasis)
solid, elevated, firm or soft mass; extending into dermis; may be benign or malignant (0.5 - 2 cm)
nodule(fibroma, intradermal nevi)
solid, elevated, firm or soft mass; extending into dermis; may be benign or malignant (> 1-2cm)
tumor(lipoma, hemangioma)
superficial, raised, erythematous lesion with irregular borders due to localized edema (transient)
wheal(varies in size)(mosquito bite, allergic reactions)
wheals coalescing to form an extensive reaction; intensely pruritic
urticaria(hives)
circumscribed, superficial, elevated cavity containing free fluid (clear - flows if ruptured) (
vesicle(herpes, chicken pox)
large vesicle; usually single chambered and thin - walled - ruptures easily (clear fluid); superficial in epidermis (> 1cm)
bulla(friction blister)
circumscribed, superficial, elevated cavity containing turbid fluid (pus) (
pustule(acne)
encapsulated, fluid or pus filled cavity in dermis or subcutaneous layer - tensely elevating skin (> 1 cm)
cyst(sebaceous cyst)
thickened, dried residue of burst vesicles, pustules or blood; red-brown, honey-colored or yellow depending on origin
crust(eczema)
compact desiccated flakes of skin (dry or greasy; silvery or white) from shedding of excess keratin cells; exfoliation of the dermis
scale(post-scarlet fever, dry skin, dandruff)
scratch mark; superficial
excoriation(scratch, insect bite, scabies, varicella)
linear crack with abrupt edges; extends into dermis (dry or moist)
fissure(cheilosis - corners of mouth; athlete’s foot)
superficial, circumscribed loss of epidermis; leaves scooped-out/shallow depression; moist, but no bleeding; no scar (bc does not extend into dermis)
erosion(stage 2 pressure ulcer)
circumscribed depression extending into dermis, irregular shape, may bleed; leaves scar once healed
ulcer(pressure sore, malignant growth)
replacement of destroyed normal skin tissue by fibrous connective tissue (permanent change)
scar
hypertrophic scar - resulting skin level elevated by excess scar tissue - invasive beyond site of injury
keloid
depressed skin level from loss of tissue; thinning of epidermis with loss of normal skin furrows (shiny, translucent skin)
atrophy
thickening and roughening of skin (usually from scratching); results from tightly packed papules; causes increased visibility of superficial skin markings
lichenification(long-standing eczema)