Derminology Flashcards
Primary skin lesion
physical alteration of skin considered to be caused directly by disease process
Macule
circumscribed, flat discoloration
Patch
circumscribed, flat discoloration >0.5 cm
Papule
domed, raised lesion
Pustule
domed papule containing pus
Nodule
domed, raised lesion >0.5 cm
Plaque
raised, flat-topped lesion >0.5 cm
Vesicle
papule containing fluid
Bulla
nodule containing fluid >0.5 cm
Wheal
edematous, transient plaque
Secondary findings
changes due to external factors such as scratching, trauma, infection, or changes caused by healing
Scale
thickening of stratum corneum
- adherent
- hyperkeratotic (thick, white scale)
- fine, white
- yellow, greasy
Crust
dried endogenous material on the skin
- serous crust (dried serum)
- hemorrhagic crust (dried blood)
Erosion
loss of epidermis
Ulcer
loss of epidermis and dermis
Excoriation
linear erosion from scratching
Fissure
linear ulceration
Lichenification
thickening of skin with accentuation of skin markings due to chronic scratching or rubbing
Atrophy
thinning of epidermis, dermis and/or subcutaneous fat
Scar
thickened, fibrous tissue
Purpura
lesions caused by extravasated RBCs
Petechiae
pinpoint red-brown macules
Ecchymosis
bruise (hematoma)
Palpable purpura
most commonly caused by vasculitis
