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28 Cards in this Set
- Front
- Back
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3 factors involved in production of acne
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1. excessive sebum production from androgenic hormone stimulation
2. abnormal follicular keratinization --> comedo formation, pilosebaceous duct obstruction 3. Prolif. of Propionibacterium that can convert lipids in sebum to FFAs --> incite inflamm |
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Acne Vulgaris
What is a closed comedone? What is an open comedone? |
closed = whitehead (1-2mm)
open = blackhead (2-3m) = papule clogged by follicle contents |
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Infection of the superficial layers of epidermis by dermatophyte fungi (microsporum, tricophyton, and epidermophton) or by malassezia furfur
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tinea
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dermatophytosis
a. patchy hair loss, scaling, black dot in scalp of kids b. erythematous, annular, or arciform lesion with well defined scaly/vesicular border, central clearing c. on groin or buttocks d. interdigital scaling and maceration e. discoloration and thickening of nail plate, subungual hyperkeratotic debris |
a. tinea capitis
b. tinea corporis c. tinea cruris d. tinea pedis e. tinea unguium |
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Erythematous hypo or hyperpigmentated patch with with slight desquamation on back or chest
-KOH shows short hyphae and spores |
Tinea versicolor
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How do you diagnose dermatophytosis?
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KOH of sclaes from lesion - see septate hyphae
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Intraepidermal tumor caused by HPV
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wart
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Warts
-flesh-to-brown -hyperkeratotic -black specks of pigment from thrombosed capillary loops -most often acral areas |
common warts (verruca vulgaris)
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Warts
finger like slender projection on face or neck |
filiform wart
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Warts
small, flesh-to-tan papules on face, neck, extensor upper extremities koebnerization |
flat warts
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Warts
thick skin of sole |
plantar warts
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warts
moist areas like genital or perianal skin most common STD |
condyloma acuminata
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Flesh-to-pearly white, waxy papules withcentral dell, found on face and flxures of children (or genital of adults)
caused by poxvirus dx? |
molluscum contagiosum
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Patient has a painful red wheal (fades in 24 hrs)
what did he get bitten by |
bees, wasps, yellow jackets
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delayed systemic allergic rxn = uritcaria, polyarthritis, lymphadenopathy
result of what kind of bite |
bee, wasp. yellow jacket
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patient has wheals with 2 hemorrhagic puncta, evolve into pustules in hours
bitten by what? |
fire ants
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Patient has pruritic, swollen papular wheals develop within hours
bitten by what |
mosquitoes
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Patient has grouped urticarial papules, some with puncta, often on legs
bitten by what |
fleas
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Clinical:
-small tan, waxy papules that become dark brown or black -greasy, verrucous surface, well-defined border -"stuck on" appearance -can have keratin pearls or horn cysts in lesions -face, chest, back |
seborrheic keratosis
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multiple, small, darkly pigmented papules seen on the cheeks and periorbital areas of black, Hispanic, and Asian patients
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dermatosis papulosa nigra
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Important condition you must rule out to diagnose seborrheic keratosis
if seborrheic keratosis arises abruptly and in crops, what might this signify |
Skin cancer (melanoma)
internal malignancy |
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Contact dermatitis
sharp margins acute angles linear patterns suggest what? |
exposure to external agents
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2 types of contact dermatitis
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irritant (80%) - erythema, blisters --> dry, thickened, fissured pattern
allergic (20%) --> delayed hypersensitivity with redness, vesiculation with oozing and crusting |
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patient exposed to sun, now has
-thinning, loss of elasticity of skin dx |
photo aging
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photoaging
thick, yellow, wrinkeled sking |
solar elastosis
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photoaging
thinning, fine wrinkling of skin |
atrophy
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photoaging
discrete raised papules with rough keratotic scaly texture, pre-malignant |
actinic keratosis
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photoaging
yellow papules that may coalesce into plaques |
solar elastosis of papulonodular type
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