Dermatology Practical & Conceptual

Zosteriform cutaneous leishmaniasis diagnosed with the help of dermoscopy

…thematous nodules, with a central ulcer covered with a yellow crust, were evident on the upper right back (Figure 1A). An erythematous papule was evident as a satellite lesion. Three similar additional lesions were found on the right upper chest (Fig…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…s eosinophils are present in a thickened epidermis covered by scale-crust. At scanning magnification, aspects of pemphigus vulgaris are not apparent; higher magnification is required to detect them. 10.77.7A: Vesicular dermatitis, intraepiderma…

Histologic Diagnosis of Inflammatory Skin Diseases

Phaeohyphomycosis

…that, in time, is followed by fibrosis. Epidermal changes of scale-crust result from parakeratosis accompanied by plasma and neutrophils. Dematiaceous (black) fungi may be present as yeasts, hyphae, and pseudohyphae in abscesses. Differential diagno…

Dermatology Practical & Conceptual

From the Dermatologikum Hamburg: Quiz

…d partly ulcerated epidermis (Figure 2G) covered by extensive scale crust housing numerous neutrophils (Figure 2S). Some neutrophils are scattered within the epidermis (Figures 2D and 2H). A diffuse infiltrate of neutrophils, lymphocytes, plasma cell…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema marginatum

…esions that, at their periphery, are topped by collarettes of scale. Urticaria consists of evanescent edematous pink papules and/or plaques that usually are distributed widely and are pruritic. Findings histopathologic Fully developed Superficia…

Histologic Diagnosis of Inflammatory Skin Diseases

Pattern Analysis in Historical Perspective

…layer (e.g., parakeratosis in mounds that house neutrophils, scale-crusts, hyphae). In regard to blistering diseases, an algorithm that achieves its purpose of enabling diagnosis accurately and with specificity can lead off with “vesicular der…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Cutaneous T-cell Lymphoma?

…iolaceous, or orange; the patches may be surmounted by a fine scale. A somewhat irregular or notched border may help differentiate early CTCL from clinically similar benign dermatoses, as may a discrete area of uninvolved skin within a larger lesion…