Eczematous Dermatitis

(Spongiotic Dermatitis)

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Epidemiology:

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Common sites:

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Gross features:

    • early:
      • pruritic
      • red
      • papulovesicular
      • oozing / crusted
    • chronic:
      • scaling plaques

 

Histologic features:

    • early:
      • spongiosis
      • intraepidermal vesicles
      • superficial, perivascular, lymphocytic infiltrate
        • mast cell degranulation
      • papillary dermal edema
      • drug-related eczematous dermatitis:
        • eosinophils
        • lymphocytic infiltrate extending around deep as well as superficial dermal vessels
    • chronic:
      • acanthosis
      • hyperkeratosis

 

Immunophenotype:

Marker:

Sensitivity:

Specificity:

 

 

 

 

Molecular features:

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Other features:

    • clinical categories:
      • allergic contact dermatitis
      • atopic dermatitis
      • drug-related eczematous dermatitis
      • photoeczematous dermatitis
      • primary irritant dermatitis
    • “eczema” – to boil over (greek)
    • prone to bacterial superinfection, forming a crust (impetiginization)

 

References:

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