Histologic Diagnosis of Inflammatory Skin Diseases

Atopic dermatitis

…surfaces, face, feet, and hands Individual lesions Erosions, ulcerations, crusts, lichenified papules, plaques, and nodules, and fissures in plaques at times; hemorrhagic crusts of excoriations often are disposed in linear array Course Lesions subsi…

Histologic Diagnosis of Inflammatory Skin Diseases

Crohn’s disease

…Vesiculopustules and tender erythematous nodules that tend to ulcerate and heal with a scar Variations clinical Cutaneous manifestations of Crohn’s disease, all of them characterized by neutrophils, range from urticaria to pyoderma gangrenosum,…

Histologic Diagnosis of Inflammatory Skin Diseases

Factitious dermatitis and panniculitis

…ound, sharply angulated, or bizarre-shaped Individual lesions Ulcers most often, but also papules and nodules Course Protracted Variations clinical Paraffinomas appear as nodules that result from injection of wax into the reticular dermis and subcut…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…3. Granulation tissue present only beneath the surface of an ulcerated lesion 4. Muscle-containing “feeder” blood vessel spirals through the reticular dermis from the base of the lesion in the subcutaneous fat 4. No “feeder&#8221…

Dermatology Practical & Conceptual

Zosteriform cutaneous leishmaniasis diagnosed with the help of dermoscopy

…red. On examination, two erythematous 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 o…