Etiology/Pathophysiology
#1 trigger of erythema multiforme
HSV
Dermatographism
Wheal produced at site of physical pressure x ~30 mins
Rosacea differential diagnoses
acne vulgaris, contact dermatitis, photodermatitis, seborrheic dermatitis
test used to help diagnose allergic skin conditions
patch testing
1st line treatment for atopic dermatitis
topical steroids
cause of "slapped cheek" rash
Parvovirus B19
honey colored crusts indicates:
Impetigo
acne differential diagnoses
rosacea, MRSA, hidradenitis supporativa, cushing's
diagnostic test for tinea
scraping with KOH prep
treatment for SSSS
IV Nafcillin/Azithromycin/Vancomycin
Pathophysiology of psoriasis
T-cell-mediated inflammatory disease with inc epidermal proliferation --> excessive scaling/raised plaques
Major sign of SJS/TEN
psoriasis differential diagnoses
eczema, lichen simplex chronicles, seborrheic dermatitis
Diagnostic test for HSV lesion
Tzank smear
Cystic acne medication requiring IPledge system and monthly bloodwork/pregnancy test
Isotretinoin
cause of lice infestation
pediculosis humanus capitis
unique characteristic of psoriasis where new lesions form with trauma
Koebner phenomenon
differential diagnoses for cellulitis
erysipelas, necrotizing fasciitis, DVT
diagnostics for malignant melanoma
ABCDE
A- asymmetric
B- border irregular
C- color variability
D- diameter greater than 6mm
E- evolving
definitive diagnosis made by biopsy
treatment for severe non-purulent treatment
vancomycin + piperacillin/tazobactam
pathogen responsible for "gas gangrene"
clostridium myonecrosis
plaque that has an orange peel texture and represents a connective-tissue hamartoma
shagreen patch
differential diagnoses for molluscum contagiosum
Verruca, chicken pox
labs ordered for androgenic alopecia
DHEAS, total testosterone, serum prolactin, CBC, Serum Ferritin
treatment/management of erythematous rosacea
sunscreen use, avoiding triggers, and Brimonidone topical gel 0.33% (Mirvaso)