Rashes Flashcards
macules and patches
flat circumscribed non-palpable macule: <1cm patch: >1cm
papules and nodules
raised
palpable circumscribed lesion
papule: <1cm
nodule: >1cm
vesicles, bulla and pustules
vesicle: clear fluid filled lesion (blister) <0.5cm
bulla: blister with clear fluid >0.5cm
pustule: blister contains pus
erythematous
red and blanching
purpura
red, non blanching
petechia
purpura <2mm
wheal
an area of oedema in the upper epidermis
scale
flakes or plates that represent compacted desquamated layers of stratum corneum
crust
the result of drying plasma or exudate on the skin
lichenification
refers to a thickening of the epidermis seen with exaggeration of normal skin lines
usually due to chronic rubbing or scratching of an area
excoriation
traumatized or abraded skin caused by scratching or rubbing
annular (ring shaped) lesions
tinea corporis
erythema migrans (lyme disease)
granuloma annulare
multiform lesions
erythema multiforme
fluid filled lesions
clear fluid - vesiculobullous rash:
varicella zoster, impetigo, scalded skin syndrome, HSV, eczema hepeticum, erythema multiforme, SJS, insect bites, burns
pustular rash:
acne, transient neonatal pustular melanosis, psoriasis
papular rashes
urticaria molluscum contagiosum scabies warts keratosis pilaris