Flashcards in CM: Making a Derm Dx Deck (25)
What is a non-glabrous vs. a glabrous distribution?
non-glabrous = hair-bearing
glabrous = non-hair-bearing
What is the name of the distribution where skin folds on itself?
What is a periungual distribution?
around the fingernails
What are classic examples of grouped distributions?
herpetiform - random grouping
zosteriform - grouping in dermatomes
What are the different discriptors of a circular distribution?
annular = complete ring
archiform = incomplete ring
polycyclic = multiple rings - suggests subacute cutaneous lupus
non-palpable change in skin color with distinct borders (usually 1 cm
palpable solid lesion 1 cm in diameter
flat topped elevation of skin surface covering large area, wider than it is high
fluid-containing superficial thin walled cavity 1 cm in diameter
What is the difference between an erosion and an ulcer?
erosions - loss of epidermis only - suggests blistering
ulcer - loss of epidermis and dermis
pus containing, superficial thin walled cavity
What diagnosis do target lesions suggest?
What diagnoses do arciform lesions suggest?
cutaneous T-cell lymphoma
What are secondary skin lesions?
excoriation, crust (dried exudates: serous, purulent, hemorrhagic), cyst, scar, lichenification (exaggerated skin markings), abscess, atrophy
What does a violaceous color suggest?
connective tissue disease
What signs indicate pathology involving the EPIDERMIS?
scale (psoriasiform, eczematous, ichthyotic)
increase/decrease in brown, grey or black pigmentation
usually NO erythema
What signs indicate pathology involving the DERMIS?
edema, red or violaceous pigment
if blanches = erythema (intravascular pathology)
if doesn't blanch = purpura (extravasation)
blue, green or yellow pigmentation
What signs indicate pathology involving the SUBCUTIS?
poorly demarcated border
fixation to underlying tissue
If you have papules and plaques, with scale, what is it called?
papulo-squamous (dermatitis, psoriasis, lichen planus, subacute cutaneous lupus, sec syphilis, etc)
What is erythrodermic?
erythema and scale over most or all of body surface area (dermatitis, erythrodermic psoriasis, etc)
What is ichthyosiform?
fish-like scale on skin
If you have vesicles and bullae on skin what is it called?
vesico-bullous (herpes, EM, impetigo, pemphigus)
What is it called if you see blisters with papules, plaques, ulcers, and erosions?
What is it called if you have discrete, scarred papules or plaques?
sclerotic (may be atrophic)