1.Vacuolar

 
         1)Lymphocyte predominant
           a)Basement mermbrane sometimes thickened.
                smudged interface. thinned epidermis
                        Discoid lupus erythematosus
            b) Individual necrotic keratinocytes. ballooning, parakeratosis     

                         Mucha-Habermann disease
 
        2)Neutrophiles and eosinophiles prominent
             a)Individual necrotic keratinocytes. ballooning
 
                        Fixed drug eruption
 

2.Lichenoid
        
         1)Lymphocytes predominent
            a)Eosinophils sometimes. focal parakeratosis 
 
                        Lichenoid drug eruption
             b)Individual necrotic keratinocytes sometimes
                        Lichenoid photoderrnatitis
            c) Individual necrotic keratinocytes. ballooning, spongiosis
                        Mucha-Habermann disease
            d)Thickened basement membrane, smudged appearance of interface.
                  thinned epidermis focally
                         Discoid lupus erythematosus
            e)Thinned epiderrnis, prorninent granular layer, parakeratosis
                              Graft vs. host reaction
            f)Abnorrnal lyrnphocytes in wedge-shaped infiltrate often plasma cells.
              eosinophils, and neutrophils, as well as small lyrmphocytes
                        Lymphomatoid papulosis
            g)Lymphocytes in epidermis. scant spongiosis 
                        Mycosis fungoides, plaque
          2)Neutrophiles,eosinophiles and plasma cells prominent
            a)Abnormal lyrnphocytes in wedge-shaped infiltrate  
                         Lymphomatoid papulosis