derm Flashcards
define macule
flat lesion with diameter <2cm
define patch
flat lesion diameter >2cm
define papule?
circumscribed raised lesion 0.5-1cm in diameter
deifne nodule?
circumscribed raised lesion >1cm in diameter
describe a plaque?
circumscribed superficial elevated plateau area 1cm-2cm in diameter
define hemangioma?
vascular papular or nodule (circumscribed raised lesion)
describe vesicle?
raised lesion with clear fluid <05.cm
describe bulla?
raised lesion with clear fluid>0.5cm
describe ulceration?
loss of whole thickness of epidermis and upper dermis
describe excorication?
partial or complete loss of epidermis as a result of scratching
describe desquamation?
peeling of superficial scale often following acute inflammation
describe annular lesions?
ring shaped
describe discoid lesions?
coin shaped lesions
ddx for viral diseases that cause blisters?
chicken pox, HFM, Herpes simplex
Ddx for bacterial lesions that cause blisters?
impetigo/acute cellulitis
Ddx for vesicles with inflammatory disorders?
eczema, contact dermatitis, insect bite reactions
ddx for immunological disorders and metabolic disorders with vesicles?
dermatitis hepetiformis, pemphigus, pemphigoid, and erythema multiforme. Metabolic - porphyria
ddx for erythema multiforme?
HSV< mycoplasma pneumoniae, hepatitis B/C, boreliosis,
ddx for pyoderma gangrenosum?
monoclonal gammopathy, rheumatoid arthritis, leukemia, IBD, hodgkins lymphoma, behcet disease
describe toxic erythema?
widespread symmetrical rash with maculopapular erythema, like morbiliform.
ddx for toxic erythema?
viruses: measles, rubella, EBV, parvo, HHV6, dengue, typhi. Bacterial: scarlet fever, RMS< trypanosomiasis
ddx for erythema nodosum infectious causes?
streptococcus, mycoplasma pneumoniae, histo, blasto,TB, coccidio.
ddx for erythema nodosum noninfectious causes?
IBD, sarcoidosis, behcet, hodgkin disease
what is this? Epidemiology, characteristic?
Treatment for atopic dermatitis?
treatment for eczema that is refractory to conservative therapy?
what is eczema caused by HSV? when do you suspect?
what is this?
Tx for seborrheic dermatitis?
what is intertrigo? Tx?
contact dermatitis is most often caused by?
What is the most common type of chemical irritant and type of allergic? Tx?