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| -small vessel <br> -medium vessel <br> -large vessel | | -small vessel <br> -medium vessel <br> -large vessel | ||
| -[[leukocytoclastic vasculitis]]<br>-[[PAN]]<br>-[[giant cell arteritis]] | | -[[leukocytoclastic vasculitis]]<br>-[[PAN]]<br>-[[giant cell arteritis]] | ||
| [[Image:Churg-Strauss_syndrome_-_high_mag.jpg |thumb|150px|[[ | | [[Image:Churg-Strauss_syndrome_-_high_mag.jpg |thumb|150px|[[Eosinophilic granulomatosis with polyangiitis|EGPA]] (WC)]] | ||
|- | |- | ||
| [[Dermatitides_with_perivascular_inflammation|Perivascular]] | | [[Dermatitides_with_perivascular_inflammation|Perivascular]] | ||
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Common locations:<ref name=Ref_PCPBoD8_603>{{Ref PCPBoD8|603}}</ref> | Common locations:<ref name=Ref_PCPBoD8_603>{{Ref PCPBoD8|603}}</ref> | ||
*Knees, elbows, scalp, | *Knees, elbows, scalp, glans [[penis]]. | ||
===Microscopic=== | ===Microscopic=== | ||
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DDx ''rips'': | DDx ''rips'': | ||
*Rheumatoid neutrophilic dermatitis. | *Rheumatoid neutrophilic dermatitis. | ||
*Bowel-associated dermatosis-arthritis syndrome. | *[[Bowel-associated dermatosis-arthritis syndrome]] (BADAS). | ||
*[[Pyoderma gangrenosum]]. | *[[Pyoderma gangrenosum]]. | ||
*Sweet syndrome. | *Sweet syndrome. | ||
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==Necrobiotic xanthogranuloma== | ==Necrobiotic xanthogranuloma== | ||
*Abbreviated ''NXG''. | *Abbreviated ''NXG''. | ||
{{Main|Necrobiotic xanthogranuloma}} | |||
=DDx for pattern= | =DDx for pattern= | ||
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*'''L'''upus erythematosus. | *'''L'''upus erythematosus. | ||
*'''L'''ymphocytic infiltrate of Jessner / tumid lupus erythematosus. | *'''L'''ymphocytic infiltrate of Jessner / tumid lupus erythematosus. | ||
*Polymorphous '''l'''ight eruption. | *[[polymorphous light eruption|Polymorphous '''l'''ight eruption]]. | ||
*'''L'''yme disease. | *'''L'''yme disease. | ||
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