Difference between revisions of "Non-malignant skin disease"

Non-malignant skin disease (view source)

803 bytes added , 20:09, 1 September 2011

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 =Less common=
+==Granuloma annulare==
+===General===
+*Benign and self-limited condition.
+*Etiology unknown - may be assoc. with trauma.<ref name=Ref_Derm51>{{Ref Derm|51}}</ref>
+===Microscopic===
+Features:<ref name=Ref_Derm51>{{Ref Derm|51}}</ref>
+*Dermal palisading granuloma around:
+**Mucin - '''key feature'''
+***Loose/pale, paucicellular, eosinophilic.
+**+/-Necrotic collagen. (???)
+*+/-Eosinophils.
+Notes:
+*There may be multiple small foci with intervening normal dermis.
+*Histomorphologically similar to ''[[Rheumatoid nodule]]''. (???)
+DDx:
+*Necrobiosis lipoidica - little mucin, no normal dermis between foci.<ref name=Ref_Derm51>{{Ref Derm|51}}</ref>
+Images:
+*[http://www.dermaamin.com/site/histopathology-of-the-skin/61-i/1813-interstitial-granuloma-annulare-.html Granuloma annulare (dermaamin.com)].
 ==Keloid==
 ===General===