Dermatology II: Seborrheic Dermatitis, Pityriasis Rosea, Lichen Planus – Flashcards
43 test answers
Unlock all answers in this set
Unlock answers 43question
describe clinical presentation of seborrheic dermatitis in infants. what is it called?
answer
cradle cap, yellow adherent scale on vertex of scalp that might affect diaper area and axillary skin too
Unlock the answer
question
clinical presentation of seborrheic dermatitis in adults (lesions)
answer
red, coalescing macules patches or plaques with greasy looking, yellow scales
Unlock the answer
question
what body areas of adult are typically affected by seborrheic derm?
answer
scalp, face (eyebrows, eyelids, nasolabial folds), presternal skin, ears, upper back
Unlock the answer
question
in who is seborrheic derm most severe?
answer
HIV/AIDs pts
Unlock the answer
question
what is seborrheic blepharitis
answer
periocular presentation of seborrheic derm, greasy appearing flakes stick to eyelashes
Unlock the answer
question
treatment of seborrheic blepharitis?
answer
warm compresses and eye lid scrubs
Unlock the answer
question
differential dx of seborrheic term?
answer
psoriasis, rosacea, perioral dermatitis, SLE rash, pityriasis rosea
Unlock the answer
question
treatment of blepharatis and cradle cap treatment
answer
olive oil to loosen crusts, baby shampoo, warm water
Unlock the answer
question
how to treat scalp sebhorreic derm? (general and then specific (3))
answer
antifungal agents and topical corticosteroids: ketoconazole shampoo, cream, selenium sulfide of antidandruff shampoo
Unlock the answer
question
how to treat sebhorreic derm of face? (2)
answer
low potency topical corticosteroid cream, topical anti fungal or combo
Unlock the answer
question
classic presentation of pityriasis rosea?
answer
Christmas tree
Unlock the answer
question
etiology of pityriasis rosea?
answer
unknown, maybe HHV-7
Unlock the answer
question
is pityriasis rosea benign or malignant?
answer
benign
Unlock the answer
question
in who is pityriasis rosea common? when does it appear?
answer
teens, young adults; fall, spring
Unlock the answer
question
prodrome of pityriasis rosea?
answer
malaise, headache, pharyngitis
Unlock the answer
question
clinical presentation of pityriasis rosea? (timing too)
answer
exanthematous eruption with primary lesion followed by secondary rash 1-2 weeks later, usually no itch
Unlock the answer
question
what is the primary lesion of pityriasis rosea called? where is it usually?
answer
herald's patch usually on the trunk
Unlock the answer
question
describe herald's patch
answer
oval, slightly raised lesion 2-5 cm, pink or salmon colored with marginal collarette scale
Unlock the answer
question
describe secondary rash of pityriasis rosea
answer
christmas tree pattern in back; fine scaled, pink, oval papules and plaques
Unlock the answer
question
what do some of the plaques of pitarias rosea look like?
answer
cigarette paper`
Unlock the answer
question
main differential diagnosis of pityriasis rosea? how to distinguish
answer
tinea corporis...KOH prep
Unlock the answer
question
differential diagnoses of pityriasis rosea
answer
tinea versicolor, guttate psoriasis, nummular eczema, drug eruptions, secondary syphillis
Unlock the answer
question
treatment of pityriasis rosea? (4)
answer
reassurance, rash is self-limiting but can last 6-8 weeks, oral antihistamines, medium strength topical corticosteroids, sun exposure
Unlock the answer
question
how long can pityriasis rosea last?
answer
6-8 weeks
Unlock the answer
question
possible causes of lichen planus? (3)
answer
idiopathic, drugs (gold, antihypertensive, antimalarial), association with hep c?
Unlock the answer
question
what drugs are associated with causing lichen planus
answer
gold, antihypertensive, antimalarial
Unlock the answer
question
what kind of response is lichen planus
answer
immune mediated, involving T cells
Unlock the answer
question
what percent of the population is affected by lichen planus? what age most frequently?
answer
about 1%, adults 30-60
Unlock the answer
question
if someone with hep C comes in with a rash what is your fist thought
answer
lichen planus
Unlock the answer
question
4 Ps of lichen planus?
answer
pruiritic, polygonal, purple, plaques/papules
Unlock the answer
question
describe clinical presentation of lichen planus
answer
papulosquamous eruption characterized by flat top purple papules on skin
Unlock the answer
question
most common sites of lichen planus (6)
answer
wrists, back, shins, scalp, penis, mouth
Unlock the answer
question
what percent of people with lichen planus have mouth presentation?
answer
50%
Unlock the answer
question
what are wickam's striae? pathoneumonic? if so, for what?
answer
fine white lines on lesions, not pathoneumonic but seen in lichen planus
Unlock the answer
question
differential diagnoses of lichen planus (3)
answer
granuloma annulare, drug eruption, graft vs host
Unlock the answer
question
why do you provide treatment of lichen planus
answer
can last 1-2 years, treatment is to hasten resolution and manage pruritis
Unlock the answer
question
1st line of treatment of lichen planus?
answer
topical steroid or intralesional (triamcinolone), high potency or super high potency on trunk and extremities
Unlock the answer
question
2nd line of lichen planus treatment (4)
answer
oral steroids, phototherapy, oral retinoids, cyclosporine
Unlock the answer
question
how long does lichen planus last?
answer
1-2 years
Unlock the answer
