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30 Cards in this Set
- Front
- Back
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circumscribed area of change in skin color without elevation or depression
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macule
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superficial circumscribed cavity of skin that contains purulent exudate
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pustule
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diminution or thinning of some or all layers of the skin
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atrophy
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defect only of the epidermis, not involving the dermis or basement membrane
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erosion
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sac containing liquid or solid or semisolid materials that may be superficial or deep
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cyst
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plateau like elevation of skin due to coalescence of papules
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plaque
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circumscribed, elevated, superficial cavity containing clear fluid >0.5 cm
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bulla
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chronic eczematous dermatitis that characteristically occurs in the form of coin-shaped plaques
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nummular eczema
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pruritic, violaceous, polyangulated, flat topped papules with wikhams striae are characteristic lesions for:
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lichen planus
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infection caused by yeast malassezia
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tinea versicola (aka pityriasis versicolor)
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3 examples of dermatophyte fungus and their nutrition
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epidermophyton
microsporum trichophyton most tinea (except versicolor and nigra) obtain nutrients from keratin |
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acute eczema
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vesicular (blister <0.5cm)
bulla (blister >0.5cm) |
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subacute eczema
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-microvesicular (blisters between epidermal cells)
-erythematous (due to vasodilation) -scaling |
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chronic eczema
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lichenification (skin thickened, pigmented, shiny)
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When does scarring occur?
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when basement membrane is damaged
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What is the difference between irritant contact dermatitis and allergic contact dermatitis?
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Irritant contact dermatitis is dependent on the concentration of the irritant and will occur in everyone. ICD is a toxic phenomenon, confined to area of exposure.
Allergic contact dermatitis is dependent on sensitization to the antigen. |
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What are some signs and symptoms of cumulative irritant contact dermatitis?
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dryness-> chapping-> erythema-> hyperkeratosis-> scaling-> fissures and crusting
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Allergic Contact dermatitis: general info
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delayed, cell-mediated, hypersensitivity reaction
occurs 48 hours to days after contact with allergen may spread to areas without contact with allergen diagnose by patch test Treatment: topical glucocorticoids immunosuppression by oral cyclosporine |
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an itch that rashes
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atopic dermatitis
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basic info about atopic dermatitis
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-usually begins in infancy
-characterized by dry skin and pruritis -IgE is usually elevated- Type 1 hypersensitivity reaction -increased risk of developing asthma -usually worse in winter Treatment: - immunosuppression by pimecrolimus or tacrolimus -topical glucocorticoids -abx to eliminate S. aureus |
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lichen simplex chronicus
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- circumscribed plaques (confluence of papules) from repetitive rubbing and scratching
-lichenification -unconscious habit of scratching- must stop scratching habit |
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dyshidrotic eczematous dermatitis
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- many deep-seated pruritic clear "tapioca like" vesicles and later scaling and lichenification
- due to hyperhydrosis - treat with botox to inhibit ACH release to eccrine sweat glands |
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seborrheic dermatitis
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redness and scaling in regions where the sebaceous glands are most active: face, scalp, body folds
melassia furfur involved pityriasis sicca: dandruff cradle cap- infants |
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nummular eczema
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coin shaped
worse in winter |
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stasis dermatitis
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"id" (self) reaction
usually on medial malleolus resulting from delayed hypersensitivity reaction to chemicals released by static blood in varicose veins that travel up leg - inflammatory papules, scaly, crusted erosions over varicosities |
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Engman's disease
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eczema
pus irritates skin becomes secondarily infected |
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what are the effects of glucocorticoids?
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glucocorticoids: regulate salt/water metabolism
act as intracellular anesthetics (put cells to sleep by working on the nucleus/DNA) - prevent inflammation cause thinning of the skin not for use on people with: -DM, -psoriasis -peptic ulcer disease -HTN |
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lichen planus
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linear configuration of lesions
pruritus violacious (violet colored) lesions associated with hepatitis B and C WICKUM STRIA- white lesions in mouth |
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pityriasis rosea
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herald patch (misnomer- raised lesion)
follows lines of skin cleavage christmas tree pattern associated with herpes 7 and 8 DO NOT GIVE SYSTEMIC CORTICOSTEROIDS |
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atopic dermatitis
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itch that rashes
those with atopy are prone to other irritant reactions |
