64. Inflammatory skin diseases and major morphologic types Flashcards
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
types of acute dermatitis (4)
eczematous dermatitis
contact dermatitis
erythema multiforme
acne vulgaris
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
pathomechanism of eczematous dermatitis
type 1 (immediate) hypersensitivity allergic, atopic, photoeczematous allergen, drug
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
clinical manifestation of eczematous dermatitis
pruritic, erythematous, oozing rash with vesicle & edema
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
pathomechanism of contact dermatitis
type 4 (cell mediated) hypersensitivity by allergens (ivy poison, nickel, chemical, drug)
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
clinical manifestation of contact dermatitis
pruritic, erythematous, oozing rash with vesicle & edema
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
pathomechanism of erythema multiforme (2)
HSV, mycoplasma, fungal infection
Steven johnson syndrome
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
clinical manifestation of erythema multiforme
targetoid rash and bullae
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
pathomechanism of acne vulgaris
hormone associated : increased sebum -> block sebacious gland -> inflammation
propionibacterium acne infection
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
types of chronic dermatitis (2)
psoriasis
lichen planus
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
pathogenesis of psoriasis
autoimmune by HLA-C or trauma
cause excessive keratinocyte proliferation
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
clinical manifestation of psoriasis (4)
acanthosis : epidermal hyperplasia
parakeratosis : nuclei in superficial keratinocyte
munro microabscess : neutrophil infiltration
auspitz sign : pinpoint bleeding
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
gross morphology of psoriasis
well demarked salmon color plaque with silvery scale
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
characteristics of lichen planus
4P
pruritic, planar, polygonal, purple papule
64-1. Inflammatory skin diseases (acute and chronic dermatitis, infective dermatitis)
microscopic characterictics of lichen planus
‘saw tooth’ like appearance of dermal-epidermal junction
64-2. Blistering skin disorders
types of blistering skin disorder (3)
pemphigus
bullous pemphigoid
dermatitis herpetiformis