derm Flashcards
lesions at site of scalp pH monitor
neonatal HSV
WBCs in pustular melanosis
PMNs
WMBs in etox
eosinophils
neonate with macular lesions, some with central vesicles
etox
diffuse scaling and erythematous papules and pustules
cutaneous candidiasis
what to think about with profuse seb derm, esp in ears
Langerhans Cell histiocytosis
primary irritant vs allergic contact dermatitis
primary irritant: right away
allergic: requires multiple exposures
pruritic rash on feet, minimal scale thickening of plantar surface, hyperlinearity of soles
juvenile plantar dermatosis
occlusive shoes and synthetic socks
tx: triamcinolone or other steroid
plaques with pin-sized bleeding spots when picked off
psoriasis
Auspitz sign
dry skin, scales that have pasted-on appearance, improves in heat/humidity, hyperlinear palms/soles
icthyosis vulgaris
AD
findings in incontinentia pigmenti
patterned blistering
delayed teeth eruption
strabismus
XL dominant
looks like ringworm but non scaling - without epidermal involvement
granuloma annulare
self limited
papule on sole of foot with break in skin
swimming pool granuloma - mycobacterium marinum
common triggers of erythema multiforme
HSV
multiple target lesions with dusky center, staring extremities –> trunk
erythema multiforme
boggy blue ulcers with necrotic base
pyoderma gangrenosum
tx scabies
permethrin, including household contacts
tx head lice
permethrin rinse, repeat in 1 week
treat close household contacts
what happens if itching continues after lice treated
inflammatory reaction
tx steroid cream
blue gray macules on abdomen/inner thigh
maculae ceruleae – means pubic lice
what to do for crabs in eyelashes
petroleum jelly
what’s seen in Wright staining of molluscum
viral inclusion bodies
clustered erythematous papules with central punctum, that recur episodically, often at night; no affected family members
papular urticaria
delayed hypersensitivity reaction to insect bite
tx: identify causative agent
MOA of salicylic cid
reduces formation of obstructive lesions
good for comedonal acne
MOA of benzoyl peroxide
bactericidal
good for inflammatory > comedonal acne
can you apply benzoyl peroxide and tretinoin together?
no - tretinoin won’t work
MOA of tretinoin
halts plugging of hair follicles
good for comedonal acne
can result in initial flare-up of acne
when to use oral antibiotics for acne
mod to severe inflammatory acne
oral antibiotics and OCPs
use back up birth control
round well defined patches of complete hair loss, occurs suddenly, bulbs seen under shedded hairs
telogen effluvium
pigmented lesions that flush and develop blisters
urticaria pigmentosa
what medications should infants with urticaria pigmentosa avoid
narcotics, NSAIDs, contrast
dx of langerhans cell histiocytosis
skin biopsy, electron microscopy
hypopigmented patches that get worse with sun exposure
pityriasis versicolor
Malassezia - dx KOH prep
tx astringents and antifungals
tx vitiligo
topical steroids
tacro
other findings in Sturge Weber
developmental delay, seizures, hemiplegia, glaucoma/vision issues
need MRI to eval for venous leptomeningeal angiomatosis
tx of port wine stain
pulsed dye laser
common infection that causes SJS
Mycoplasma
brown/red plaque with scaling in axillae, groin, toe webs; bright red fluorescence with Woods lamp
erythrasma
tx: erythromycin + azole
bad icthyosis in male neonate - what dz and what other findings?
X linked recessive icthyosis
GU anomalies - undescended testes, underdeveloped penis and scrotum
port wine stain on lower extremities - what syndrome to consider
Klippel Trenaunay
limb/soft tissue overgrowth
vascular malformations
criteria for dx of NF1
6+ cafe au lait spots (>5mm in kids, >15mm post pub) iris hamartomas neurofibromas optic nerve gliomas inguinal/axillary freckling tibial pseudoarthrosis family hx
inheritance NF1
AD
chromosome 17
risks in NF1
pheochromocytoma
renal artery stenosis
monitor for HTN
hearing loss/tinnitus, cataracts
NF2
chr 22
features of tuberous sclerosis
3+ ash leaf spots periventricular/cortical tubers sebaceous gland hyperplasia (can look like acne) shagreen patch subungual fibroma cardiac rhabdomyoma retinal nodular hamartomas renal angiomyolipoma
developmental abnormalities of teeth, nails, hair, sweat glands
ectodermal dysplasia
recurrent blistering of the skin and mucosa, nail changes
epidermolysis bullosa
dandy walker, large facial hemangioma, cerebral arterial anomalies, coarctation, microphthalmia
PHACE
ANA in cutaneous lupus
speckled
Ro and La
boy with frontal bossing, pegged teeth, absent sweating, periorbital wrinkling
hypohidrotic ectodermal dysplasia
XL recessive
what to think of with childhood basal cell carcinoma
Gorlin syndrome
AD
risk of ovarian tumors, medulloblastoma
unilateral irregularly speckles blue/gray facial discoloration
nevus of Ota
risk of cutaneous and ocular melanoma
