dermatology Flashcards
stuck on appearance
seborrhoeic keratosis/basal cell papilloma
lesser trelat sign
eruption seborrhoeic keratosis suggesting internal malignancy
patch test
contact allergic dermatitis
skin fraily/blisters increased hair growth
porphyria cutanea tarda
silver scales, extensors, well defined, munroe microabsess, auspitz sign
psoriasis
irregular sawtooth acanthosis
lichen planus
wickhan striae, cytoid boies
lichen planus
nickolskys sign +ve, flacid blisters, errosions, mucosal involvement
pemphigus vulgaris
chicken wire IgG in epidermis on histology
pemphigus vulgaris
linear IgG at basement membrane on histology
bullous pemphigoid
large tense vesicles itchy, dont burst, Nikolskys -ve
bullous pemphigoid
coeliac disease, ttga +ve
dermatitis herpetiform
papillary dermal microabessesses
dermatitis herpetiform
patchy granular IgA
dermatitis herpetiform
recurrent facial flushing
rosacea
honey coloured crust
impetigo
severe pain worse than visible signs
necrotising fasciitis: group B strep
varicella
chicken pox
dermatomal distribution
shingles: VZV
deafness, vertigo, tinnitus
Ramsay Hunt Syndrome
shingles >4ws
post herpetic neuralgia
trigeminal distribution shingles
opthalmic zoster
erythema nodosum
sarcoidosis
small umbilicated translucent papules, solid
molluscum contagiosum
kaposi’s sarcoma
HIV
firm fleshy nodule, yellow periphery, red centre, hand of sheep farmer
orf
monomorphic punched out lesion on buttocks
eczema herpeticum: herpes simplex virus, emergency tx: acyclovir
target lesion bullseye rash
erythema multiforme
blistering rash back of mouth
herpangia: enterovirus/coxsackie
rash + acute arthritis
parvovirus B19
intense erythema on chest, prox limbs children
slapped cheek, parvovirus B19
erythematous bullseye lesions
lymes disease ; b. burgdofeli, erythema migrans
chancre, snail track ulcers, rash on palms and soles
syphyllis: treponema pallidum
lip lick chellitis
contact irritant dermatiits
spongiosis
eczema
fillagrin mutation, no granular layer, fish like scale
ichthyosis vulgaris
heliotropic rash, scale on knuckles
dermatomyositis
periungual fibromata, infant seizures, ash leaf macule, shagreen patches, enamel pitting, hamartoma, angiofibroma
tuberous sclerosis
TSC1: Ch 16 hamartin
TSC2: Ch 9 tuberin
childhood onset BCC
gorlins syndrome AD PTCH1 gene, palmar pits, jaw cysts, calcification falx, medulloblastoma, fibromas
widespread blisters, skin shedding on slight handling
epidermolysis bullosa
cafe au lait macules, axillary freckling, lisch nodules, optic glioma
neurofibromatosis 1 AD
cheesy keratin, cyst swelling
epidermoid cysts
histocytoma, trauma insect bite on leg peripheral ring nodule
dermatofibroma
picket fenced border, pearly rolled edge, central ulceration, telangectiasia
BCC
rodent ulcer
nodular BCC
scaly plaque whipcord margin
superficial BCC
flat deep poor defined
morphoeic BCC
hyperkeratotic crust lump can bleed, painful
SCC
cauliflower appearance
plantar warts
bunch of grapes on dermatoscope
angioma
velvet thickened lesion in axillae
acanthosis nigricans
early onset multiple BCC
naevoid BCC
familial dysplastic naevus
gaitor area, shallow ulcer, ABPI > 4 wks
chronic venous ulcer