Dermatitis: Difference between revisions
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===Non vesicullobullous, non-pustular lesions with epidermal changes=== | ===Non vesicullobullous, non-pustular lesions with epidermal changes=== | ||
{|class="wikitable" | {|class="wikitable" | ||
! Main types<ref name="Alsaad2005"/> !! Characteristics !! | ! Main types<ref name="Alsaad2005"/> !! Characteristics !! Micrograph !! Photograph | ||
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! Spongiotic dermatitis || || | ! Spongiotic dermatitis || || | ||
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====Lymphocytic infiltrate==== | ====Lymphocytic infiltrate==== | ||
{|class="wikitable" | {|class="wikitable" | ||
! Main conditions<ref name="Alsaad2005"/> !! Characteristics !! | ! Main conditions<ref name="Alsaad2005"/> !! Characteristics !! Micrograph !! Photograph | ||
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! Urticaria, lymphocyte predominant | ! Urticaria, lymphocyte predominant | ||
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====Lymphoeosinophilic infiltrate==== | ====Lymphoeosinophilic infiltrate==== | ||
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! Main conditions<ref name="Alsaad2005"/> !! Characteristics !! | ! Main conditions<ref name="Alsaad2005"/> !! Characteristics !! Micrograph !! Photograph | ||
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! Urticaria, lymphocyte predominant | ! Urticaria, lymphocyte predominant | ||
| Perivascular location. Mast cells are relatively sparse, potentially demonstrated with special stains, preferably tryptase stain. Extravasated erythrocytes are present in about 50% of the cases. No vasculitis.<ref name="BarzilaiSagi2017"/> | | Perivascular location. Mast cells are relatively sparse, potentially demonstrated with special stains, preferably tryptase stain. Extravasated erythrocytes are present in about 50% of the cases. No vasculitis.<ref name="BarzilaiSagi2017"/> | ||
| [[File:Micrograph of urticaria.jpg|190px]] Dermal edema (solid arrows) and a sparse superficial predominantly perivascular and interstitial infiltrate of lymphocytes and eosinophils (dashed arrow) | | [[File:Micrograph of urticaria.jpg|190px]] Dermal edema (solid arrows) and a sparse superficial predominantly perivascular and interstitial infiltrate of lymphocytes and eosinophils (dashed arrow) | ||
| [[File:Urticaria near navel.jpg|190px]] | |||
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! Prevesicular stage of bullous pemphigoid | ! Prevesicular stage of bullous pemphigoid | ||
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*Positive epidermal side staining by [[indirect immunofluorescence]] microscopy on human salt-split skin (IIF SSS) on a serum sample. | *Positive epidermal side staining by [[indirect immunofluorescence]] microscopy on human salt-split skin (IIF SSS) on a serum sample. | ||
| [[File:Micrograph of infiltrate in bullous pemphigoid.jpg|190px]] | | [[File:Micrograph of infiltrate in bullous pemphigoid.jpg|190px]] | ||
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! Not otherwise specified | ! Not otherwise specified | ||
| A lesion with superficial lymphoeosinophilic infiltrate without additional histopathologic characteristics can be due to for example drug reactions and insect bites.<ref name="Alsaad2005"/> | | A lesion with superficial lymphoeosinophilic infiltrate without additional histopathologic characteristics can be due to for example drug reactions and insect bites.<ref name="Alsaad2005"/> | ||
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