1.Perivascular only

 
         1)Lymphocyte predominant
           a)No other change
                   Polyrnorphous light eruption,early
                   Erythema figuratum
                   Erythema chronicum migrans 
                   Pernio
                   Erytherna nodosum (no subcutaneousfat in
                   superficial biopsy specirnen) 
            b) Marked edema in papillary dermis
                     Polyrnorphous light eruption
            c)Abundant mucin in reticular dermis
                     Discoid lupus erythernatosus, tumid
            d)Nuclei of lymphocytes crenulated
                     Chronic lyrnphocytic leukernia
                      B-cell lymphoma
 
        2)Eosinophiles prominent
             a)Wedge shaped infiltrate
 
                      Arthropod assault and sirnulators of it.
 
         3)Plasma cells prominent 
 
                        Erythema chronicum migrans
                        Scleroderma
 
         4) Histiocytes and  lymphocytes prominent 
 
                        Leprosy indeterminant 
 

2.Perivascular and Interstitial
        
         1)Neutrophiles prominent
            a)Neutrophiles splayed between colagen bundles in focus
                 in reticular dermis
 
                       Supprative folliculitis(periphery of lesion)
             b)Neutrophiles in and around eccrine gland
                          Neutrophilic eccrine hidradenitis
            c)Wedge-shaped infiltrate
                        flea bite
            d)Sparse infiltrate,neutrophiles splayed between
                 collagen bundles in reticular dermis
                        cellulitis
            e)Rims of homogenous materialaround venules 
                 in upper part of dermis
                        Erythropoietic protoporphyria
          2)Eosinophiles prominent
            a)Wedge-shaped infiltrate
                        Arthropood assault and aimulators of it
                        Erythema chronicum migrans
            b)"Flame figures"ina variable numbers
                        Well's syndrome
 
         3)Eosinophiles and neutrophiles
             a)Sparse infiltrate
                        Urticaria 
 
         4)Plasma cells present
             a)Eosinophiles sometimes present also
                         Erythema chronicum migrans
          5) Neutrophils, eosinophils,and plasma cells  
              a)"Bottom heavy" infiltrate often. hints of crowded. thickened                           bundles of collagen sornetimes
                          Scleroderrna, early
          6) Histiocytes predorninate    
              a)mucin in center of palisades
 
                      Granulorna annulare
              b)Degenerated collagen early,thickend collagen late in 
                    center of palisades
                      Necrobiosis lipoidica             
               c)"Bottorn heavy" infiltrate often. eosinophils and neutrophils in                      conjunction with degeneration of collagen bundles focally
                       Interstitial granulornatous dermatitis with arthritis

               d) Few lyrnphocytes in epidermis. scant spongiosis
  
                         Mycosis fungoides, granulornatous