Fig. 9.1 A mild superficial perivascular lymphocytic infiltrate that focally approaches the dermo–epidermal junction is characteristic of morbilliform drug eruption as well as exanthem. In this case, the patient had…

Fig. 8.1 A nonspecific mild superficial perivascular lymphocytic infiltrate accompanies epidermis with several discrete lymphocytes with clear halos within the basal layer, characteristic of mycosis fungoides What Is Epidermotropism? As…

Fig. 7.1 Beneath an unremarkable epidermis, a focus of basophilic degeneration of collagen is surrounded in a palisading manner by histiocytes and lymphocytes characteristic of granuloma annulare Definition Unlike the…

Fig. 6.1 Moderately compact orthohyperkeratosis, hypergranulosis, mild acanthosis, saw-toothing of the tips of the rete, few dyskeratotic basal cells, and a band-like lymphocytic infiltrate are characteristic of lichen planus What…

Fig. 1.1 Bottom panel reveals almost continuous single melanocyte proliferation in the epidermal basal layer, solar elastosis; diagnosis lentigo maligna. Top panel reveals less obvious basal melanocytic proliferation; diagnosis atypical…

Fig. 2.1 Top panel reveals junctional proliferation of melanocytes in a predominantly nested pattern characteristic of junctional nevus. Bottom panel reveals that many melanocytes are hyperchromatic and that some nevus…

Fig. 4.1 Biopsy of acral skin lesion reveals marked spongiosis and intraepidermal vesicle in addition to a superficial lymphocytic infiltrate; thus, diagnosed as acute spongiotic dermatitis. In this case, the…

Fig. 3.1 The epidermis and papillary dermis are unremarkable. The reticular dermis reveals a perivascular lymphocytic infiltrate; thus, diagnosis as hypersensitivity reaction. In this case, an extensive search for a…

Fig. 5.1 Biopsy from a solitary plaque of LSC reveals compact orthohyperkeratosis, marked epidermal hyperplasia, and fibrosis of the superficial dermis along with a mild lymphocytic infiltrate What Is Psoriasiform…