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30 Cards in this Set

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circumscribed area of change in skin color without elevation or depression
macule
superficial circumscribed cavity of skin that contains purulent exudate
pustule
diminution or thinning of some or all layers of the skin
atrophy
defect only of the epidermis, not involving the dermis or basement membrane
erosion
sac containing liquid or solid or semisolid materials that may be superficial or deep
cyst
plateau like elevation of skin due to coalescence of papules
plaque
circumscribed, elevated, superficial cavity containing clear fluid >0.5 cm
bulla
chronic eczematous dermatitis that characteristically occurs in the form of coin-shaped plaques
nummular eczema
pruritic, violaceous, polyangulated, flat topped papules with wikhams striae are characteristic lesions for:
lichen planus
infection caused by yeast malassezia
tinea versicola (aka pityriasis versicolor)
3 examples of dermatophyte fungus and their nutrition
epidermophyton
microsporum
trichophyton
most tinea (except versicolor and nigra)
obtain nutrients from keratin
acute eczema
vesicular (blister <0.5cm)
bulla (blister >0.5cm)
subacute eczema
-microvesicular (blisters between epidermal cells)
-erythematous (due to vasodilation)
-scaling
chronic eczema
lichenification (skin thickened, pigmented, shiny)
When does scarring occur?
when basement membrane is damaged
What is the difference between irritant contact dermatitis and allergic contact dermatitis?
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.
What are some signs and symptoms of cumulative irritant contact dermatitis?
dryness-> chapping-> erythema-> hyperkeratosis-> scaling-> fissures and crusting
Allergic Contact dermatitis: general info
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
an itch that rashes
atopic dermatitis
basic info about atopic dermatitis
-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
lichen simplex chronicus
- circumscribed plaques (confluence of papules) from repetitive rubbing and scratching
-lichenification
-unconscious habit of scratching- must stop scratching habit
dyshidrotic eczematous dermatitis
- 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
seborrheic dermatitis
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
nummular eczema
coin shaped

worse in winter
stasis dermatitis
"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
Engman's disease
eczema
pus irritates skin
becomes secondarily infected
what are the effects of glucocorticoids?
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
lichen planus
linear configuration of lesions
pruritus
violacious (violet colored) lesions
associated with hepatitis B and C
WICKUM STRIA- white lesions in mouth
pityriasis rosea
herald patch (misnomer- raised lesion)
follows lines of skin cleavage
christmas tree pattern
associated with herpes 7 and 8
DO NOT GIVE SYSTEMIC CORTICOSTEROIDS
atopic dermatitis
itch that rashes
those with atopy are prone to other irritant reactions