1 - Derm - Introduction + Examination - Terminology Flashcards
eruption =
lesion=
pruritis=
erythematous=
=rash
=any single small area of skin disease
=sensation of itching
=redness
difference between macule and a patch
BOTH flat nonpalpable change in skin colour
Macule - <0.5 cm diameter (freckle=pigmented macule)
Patch - >0.5
elevation due to fluid in a cavity - 3 terms and meanings
vesicle - fluid below epidermis <0.5cm diameter
bulla - fluid below epidermis >0.5cm
pustule - visible collection of pus in subcutis
elevation due to solid masses - papule vs plaque vs nodule
papule - raised area <0.5cm
nodule - raised mass or lump >0.5cm
plaque - raised area >2cm - flat topped
elevation due to solid masses - wheal vs callus
wheal - dermal oedema
callus - hyperplastic epidermis, often found in soles/palms/other places friction+use
Loss of skin
-erosion vs ulcer
erosion - partial epidermal loss, heals without scarring
ulcer - full thickness skin loss, heals with scarring
Loss of skin
-fissure vs atrophy
fissure - linear crack
atrophy - thinning of epidermis
Secondary lesions
scale vs crust (scab)
scale - small thin piece of horny epithelium - like a fish
crust/scab - dried exudate is a crust of blood/plasma
Secondary lesions
excoriation , lichenification
exc - scratch marks
lichenification - thickened epidermis with exaggerated skin markings - bark like - usually from repeated scratching
Vascular lesions
telangiectasia, spider naevus, purpura
tel - easily visible superficial blood vessels
spider naevus - single telangiectasic artieriole in skin
purpura - rash cuased by blood in skin - often multiple petechiae
Vascular lesions - petechia, ecchymosis, erythema
pet - microhaemmorhage 1-2mm diameter
ecchymosis - bruise - technically a form of purpura
erythema - local vasodilatation giving reddening of skin
