VASCULITIS

Small vessel

Venule

Lymphocytes and histiocytes

In the center of palisades:
Mucin
Granuloma annulare
Degenerated collagen Necrobiosis lipoidica, early
Crowded thickened bundles of collagen Necrobiosis lipoidica, late
Extensive degeneration of collage, necrosis of inflammatory cell Necrobiotic xanthogranuloma
Fibrin Rheumatoid nodule