Patchy Alopecia
Fig. 13.1 Upper panel reveals centrally confluent hairless smooth patches, characteristic of lichen planopilaris. Lower panel reveals closely set hairless patches with scaling and excoriations in a patient with discoid…
Face infiltrated Plaques/Nodules
Fig. 12.1 Upper panel reveals reddish, smooth edematous plaques over the face. Histological examination revealed primary follicular mucinosis. Lower panel reveals a solitary orangish, smooth nodular plaque. Histological examination confirmed…
Reddish Facial Papules
Fig. 11.1 Upper panel shows a papular eruption over the face that favors the cheeks. Histological findings are characteristic of granulomatous rosacea. Lower panel shows a diffuse papular eruption over…
What Is Drug Eruption?
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…
What Is Pseudolymphoma?
Fig. 10.1 Top panel reveals an unremarkable epidermis and papillary dermis. The reticular dermis contains a dense collection of cells. Bottom panel reveals a monomorphous infiltrate of small lymphocytes. The…
What Is Dermatitis with Epidermotropism?
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…
What Is Granulomatous Dermatitis?
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…
What is Atypical Junctional Melanocytic Hyperplasia?
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…
What Is Lichenoid Dermatitis?
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…
What Is Spongiotic Dermatitis?
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…
