SUPERFICIAL AND DEEP PERIVASCULAR DERMATITIS
NO EPIDERMAL INVOLVEMENT - PERIVASCUALR AND INTERSTITIAL
| Neutorophils prominent | Neutrophils splayed between collagen bundles in focus in reticular dermis | Suppurative folliulitis |
| Neutrophils in and around eccrine glands | Neutrophilic eccrine hidradenitis | |
| Wedge-shaped infiltrate | Flea bite | |
| Sparase infiltrate, neutrophils splayed between collagen bundles in reticular dermis | Cellulitis | |
| Rims of homogeneous material around venules in upper par of dermis | Erythropoietic protoporphyria | |
| Eosinophils and neutrophils | Sparse infiltrate | Uriticaria |
| Plasma cells present | Eosinophilis sometimes present also | Erythema chronicum migrans |
| "Frame figures" in variable numbers | Wells' syndrome | |
| Neutrophils, eosinophils, and plasma cells | "Bottomheavy" infiltrate ofte, hints of crowded, thickened bundles of collagen sometime | Scleroderma |
| Histiocytes predominate | Mucin in center of pallisades | Granuloma annulare |
| Degeneration of collagen early, thickened collagen late in center | Necrobiosis lipoidica | |
| "Bottomheavy" infiltrate ofte, eosinophils and neutrophils in conjunction with degemeration of collagen bundles focally | Interstitial granulomatous dermatitis with arthritis | |
| Few lymphocytes in epidermis, scant spongiosis | Mycosis fungoides, granulomatous |