dermatology Flashcards
diagnosed w/ KOH
fungus
diagnosed under a microscope of unscratched lesion or burrow for mites, eggs, feces
scabies
diagnosed by scraping the base of a vesicle
HSV
shave biopsy
epidermal and superficial
biopsy for epidermal, dermal and superficial subcutaneous lesions
punch
true or false absorption is greater in a premature infant?
true
this has maximal water retaining properties
ointment
contain 20-50% water
creams
what is most useful for areas w/ hair?
solutions and alcohol based gels
antiinflam agent used for atopic dermatitis?
tacrolimus ointment
antiinflam ointment used for acne?
1-5% sulfur
anti inflam agent used for eczema and psoriasis
tar
occurs as a direct T - cell mediated response to an exogenous applied allergen that must have an initial sensitization
allergic contact dermatitis
clinical features of allergic contact dermatitis
papules and vesicles
which type of contact dermatitis is dose dependent?
primary irritant contact dermatitis
what is the most common type of primary irritant contact dermatitis?
diaper dermatitis
erythema on buttocks without involvement of inguinal creases is generally?
primary irritant contact dermatitis
erythema on buttocks WITH inguinal crease involvement is?
candida
treatment of diaper dermatitis
zinc oxide, moistures, and cleaning skin
candida diaper tx?
nystatin, clotrimazole
this is a dermatitis result of a reaction to pityrosporum oval?
seborrheic dermatitis
where does seborrheic dermatitis occur?
anywhere with high sebaceous glands
where do infants mostly get seborrheic dermatitis?
cradle cap (scalp)
what does seborrheic dermatitis look like?
greasy, red scales and crusts
age group for pitryiasis rosea
LATE childhood and adolescence
what is the distribution of pitryiasis rosea?
christmas tree
sequence of pitryiasis rose
first large 2 cm - 5 cm PAPULOSQUAMOUS scaly erythemateous HERALD PATCH appears for 30 days
1-2 weeks after herald patch appears then oval erythematous MACULES and PAPULES appear.
what is the tx for pityriasis rose?
topical or systemic antihistamines
silvery nongreasy scaling papules and plaques
psoriasis
koebner phenomenon
new lesions develop at sites of skin trauma
what part of the finger is commonly involved in psoriasis
nail involvement
how is psoriasis inherited?
autosomal dominant
heat rash
miliaria rubra
what causes heat rash
disrupted, occluded sweat ducks near upper dermis of skin causing inflammatory response
management of heat rash?
avoidance of occlusive clothing
what causes serum sickness?
cephalosporins
fever, arthralgias, adenopathy and evidence of organ injury
serum sickness
this is a severe reaction to drugs causing wide spread skin loss and severe mucous membrane involvement w/ positive nikolsky sign
Toxic epidermal necrolysis
this causes erythema multiform major
mycoplasma pneumo
treatment of m pneumo
erythromycin or azithromycin
what is common within all 3 classes of erythema multiforme
target lesions
describe a target lesion
fixed dull red oval macule dusky center that may contain papule or vesicle
