dermatology Flashcards
flat small lesion
macule
flat large lesion
patch
small raised lesion
papule
broad raised lesion - platau
plaque
broad mountain like lesion
nodule
small clear fluid filled lesion
vessicle
large clear fluid filled lesion
bulla
shallow loss of epidermis
erosion
deeper loss of epidermis and dermis
ulcer
crust is
dried exudate
seborrhhiec keratosis
related to age
keratoacanthoma
have the ability to act as an SCC - histopathologists find them similar under the microscope from normal SCCs
have to be removed
solar keratosis
pre cancerous unlike seborrhheic keratosis, can turn into SCCs but risk of transformation is small and slow but real
the more lesions you have the more chance than one of them will turn into an SCC
5-fluorouracil topical chemotherapy drug
or cryotherapy
lentigo
locally increased production of melanin
lentigenes is plural
naevus
proliferation in melanocytes
may be flat or compound (raised)
ABCD
Asymmetry
irregular Border
multiple Colours
Diameter > 6mm
for concerning lesions
lentigo maligna
in situ melanoma - can progress to invasive melanoma
diagnose with excisional biopsy (not punch biopsy or shave biopsy)
how should a lesion be diagnosed
excisional biopsy otherwise you risk sampling error
how do you know its a wart
the tiny black spots on the top
treatment of warts
cryotherapy
salicylic acid patches/paint
file down the wart then apply the salicylic acid
moluscum contagiousum
contagious
self resolving over weeks
raised with a core
zoster
antiviral medication
to prevent progression to post hepatic neuralgia
particuraly people who are older and have pain at presentation
scabies
mits burrowing into the skin
low socioeconomic
treated with insecticide cream
head lice
physical removal through combing
insecticide shampoos - gorwing issue of resistance
tinia corporis
ringworm
caused by a fungus
tinea cruris
pityriasis rosea
infectious
likely caused by type of human herpes virus
does not need specific treatment
pityriasis versicolor/tinia versicolor
mallasesia furfur
fungal rash
candidiasis
urticaria
atopic dermatitis
steroid cream
moisuriser
avoiding irritants
eczema usually means this but eczema can mean other things
seborrhoeic dermatitis
flakey dermatitis
psoriasis
flaky plaques as extensor surfaces
steroids
phototherapy
immunotherapy
acne
doxycycline
benzyl peroxide
topical antibitocis
roacutane
BCC looks like
telangiectasia (little blood vessels)
nodular or ulcerated
nodular or ulcerated needs excising
superficial lesions may be treated topically
morpheic lesions are more difficult to deal with
