SPONGIOTIC

1.Spongiotic only

1)Lymphocyte predominate


      a)Sparse perivascular infiltrate of lymphocytes 

                    Photoallergic dermatitis. early

      b)Moderately dense perivascular infiltrate of lyrmphocytes

                     Polyrmorphous light eruption

2)Eosinophiles prominent


      a)Wedge-shaped infiltrate, eosinophils in reticular dermis mostly 

                    Arthropod assault and simulators of it

      b)Eosinophils in papillary dermis mostly
 
                    Bullous pemphigoid/Herpes gestationis. urticarial

2.Psoriasiform

1)Lymphocyte predominate


      a)Spongiosis prominent 

                    Photoallargic dermatitis

      b)Spongiosis scant 
   
                     Mycosis fungoides,plaque

3.Lichenoidy

1)Lymphocyte predominate


      a)Neutrophils and eosinophils in addition to lyrmphocytes
         spongiosis and ballooning prorminen 

                    Fixed drug eruption

      b)Neutrophils often in addition to lyrnphocytes, prorninent
      spongiosis
 
                    Dermatophytosisn

      c)Plasma cells prorminent. scant spongiosis 

                    Acroderrmatitis chronica atrophicans

      d) Plasma cells not prominent, scant spongiosis
                                           Mycosis fungoides,plaque

4.Psoriasiform lichenoid

1)Lymphocyte predominate


      a)Lymphocytes in epidermis,scant spongiosis 

                    Mycosis fungoides,plaque
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