1.Spongiotic only

1)Lymphocyte predominate
              No other findings----------------Allergic contact dermatitis/
                                                                     Nummular dermatitis/
                                                                     Dyshidrotic dermatitis/
                                                                     Id reaction/
                                                                     Photoallergic dermatitis, early
                   
              Hyphae in cornified layer----------Dermatophytosis

              Spongiosis centered --------------Miliaria rubra
              in acrosyringia

              Spongiotic simulation of ----------Gianotti-Crosti syndrorne
              Pautrier's collections

               Mounds of scale-crust-------------Pityriasis rosea/
                                                                        Erythema annular centrifugum

               Mounds of scale-crust at lips -------Seborrheic dermatitis
               of infundibular ostia

               Individual necrotic keratinocytes, ---Lichen striatus
               foci ofparakeratosis

               Scant spongiosis, -----------------Pityriasis alba
               slight parakeratosis

               Few lymphocytes in epiderrnis,------ Mycosis fungoides. macule/patch.
               scant spongiosis
               elongated mounds of scale-crust

2)Eosinophiles prominent
              Variable nurnbers of eosinophils------Pruritic urticarial papules and plaquesof pregnancy
              in upper half of dermis,
              slight spongiosis

              Eosinophils in dermis and-------------Allergic contact dermatitis/
              sometimes in epidermis                         Nummular dermatitis/ 
                                                                             Dyshidrotic dermatitis/
                                                                            Id reaction. early
            
             Eosinophils as solitary units in---------Bullous pemphigoid/
              diffuse fashion in epidermis                   Herpes gestationis/
                                                                              Permphigus vulgaris. urticarial

             Eosinophils in collections in -----------Incontinentia pigmenti
             foci of prorninent spongiosis

             Eosinophils in collections in -----------Toxic erythema of the newborn
             foci of scant spongiosis

             Eosinophils in focus of prominent -------Archropod assault, superficial
             spongiosis above apex of 
             wedge-shaped dermal infiltrate

 

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2.Psoriasiform

1)Lymphocyte predominate
               Prominent spongiosis, scale-crust------Allergic contact dermatitis/
                                                                                Nummular dermatiiis/
                                                                                Dyshidrotic dermatitis/
                                                                               Id reaction

               Scale-crusts at lips of ----------------Seborrheic dermatitis
               follicular ostia

               Scale-crusts not at lips ---------------Nonbullous congenital
               of follicular ostia                                     ichthyosiform erythroderma

                Periadnexal infiltrate of lymphocytes,--Lichen striatus
                necrotic keratinocytes

3.Lichenoid
1)Lymphocyte predominate

                 Periadnexal infiltrate of lymphocytes--Lichen striatus.
                 necrotic keratinocytes,                          Bullous pemphigoid/
                 spongiosis with numerous eosinophils    Herpes gestationis, urticarial

                 Lymphocytes as solitary units.--------- Mycosis fungoides, patch/plaque
                 at least. in epidermis,
                 spongiosis scant, wiry bundles of
                 collagen in upper part of derrnis


4.Psoliasiform Lichenoid
1)Lymphocyte predominate

                 Periadnexal infiltrate of lymphocytes,---Lichen striatus
                 necrotic keratinocytes

                Spongiosis with numerous eosinophils----Bullous pemphigoid/Herpes gestationis.
                                                                                   urticarial

                 Lymphocytes as solitary units, ----------Mycosis fungoides. patch/plaque
                 at least, within epidermis,
                 spongiosis scant, wiry bundles of
                 collagen in upper part of dermis