Derm Flashcards
red, tender, indurated skin lesion with sharply demarcated borders
erysipelas, GAP –> IV cefazolin
superficial skin infx
measles (for C’s)
cough, corzya, conjunctivitis, (k)coplik spots
+diffuse maculopapular rash
+high fever!!
give vit a to prevent complications!
tinea versicolor
doesn’t tan
“spaghetti and meatballs” on KOH prep
tx with selenium sulfide
scabies
affects skins, wrists, ankles, interdigital folds
- very pruritic
- worse at night
- tx= permethrin
do you treat molluscum contagiousum?
no
treatment of tinea capitis
griseofulvin
who gets molluscum contagiosum
young kids and immunosuppressed patients
its a pox virus
bullous impetigo
staph a expholiative toxin a
- very contagious/common in kids
- causes puriritc rash on trunk with flaccid bullae and +Nikolsky
- brownish crust
tx with first gen ceph
bullae in bullous pemphigoid=
tense, - nikolsky –> because epithelium is intact over hemidesmosomes/BM
bullae in pemphigus vulgaris=
flaccid, + Nikolsky –> because desmosomes between cells are above BM and can easily break apart
what causes plantars warts
HPV
ringworm
tinea corporis
tx with miconazole
parasthesias, hypopigmented skin, sensory neuropathy
leporasy –> rifampin + dapsone
non healing skin ulcer should be concerned for…
marjolin ulcer
parkland formula
4 x %burned x kg
first half over first 8 hours,
disseminated gonoccocal arthritis
migratory polyarthritis
epidermoid cyst
slow growing,
acral, lentiginous melanoma
palms, soles, nail beds, mucus membranes
mostly darker skinned or asian ppulations
how should you manage lichen sclerosus
punch bx to confim dx and r/o SCC, then high dose steroids
how to resect melanoma
if deeper than >1mm, automatically breslow II –> resect with 1-2 cm margin and sentinel lymph nodes
pruritic, gneralized erythematous rash in VARYING stages
vzv, chicken pox
macules, papules, crusts
pearly, indurated, rolled borders with central depression
basal cell carcinoma
how do you manage chemical skin burns
warm water irrigation!! (unless its K or Mg)
indications for Moh’s in BCC
> 6mm with high likelihood of recurrence (keratinizing features)
a full excisional bx would probably be the first step
who gets treated for VZV chicken pox?
immunosuppressed (HIV, cancer, kids on steroids, lung disease)
t/f: drug induced hypersensitivity (ie carbamezapine) can cause LAD
true. facial edema, LAD, accentuation of hair follices.
presentation of rosacea
chronic inflammatory skin do characterized by central facial erythema with talengiectasias, pustules that gets worse with triggers (sun, stress, alcohol)
first line tx= avoid triggers and topical metronidazzole
how does pyoderma grangrenosum evolve?
extraintestinal manifestation of chron’s that can rapidly progress from small trauma (ant bite) to large wound with purple borders and necrotic center
how do bugs implicate burn victims?
<5 days= g+ (staph a)
> 5 days= g- (PSA), fungi (candida)
**signs of burn sepsis: tachy, hypotension, thrombocytopenia, hyperglycemia
tetrad of HSP
- LE palpable purpura
- LE arthralgias
- abd pain/ intussuecption
- renal dz –>hematuria
IgA mediated vasculitis
pitaryasis
self limiting viral prodrome that begins with HERALD PATCH followed by clusters of erythamatous oval patches in “christmas tree” pattern along lines of tension
ichthyotosis vulgaris
inherited skin disorder with diffuse dermal scaling that is worse in winter months
tx= emollients, topical reitnoids
