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Histologic Diagnosis of Inflammatory Skin Diseases

Images

…ondition is termed “atrophie blanche” because the scars are white. 10.62.3A: Vasculitis, small-vessel type, mixed-cell + 10.62.3B: Thrombi in the lumen of many venules and in the wall of some of them, neutrophils, lymphocytes, a…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Parapsoriasis?

…ules, vesicles, some of which may be hemorrhagic, ulcers, and scars. When lesions of Mucha-Habermann disease develop slowly (pityriasis lichenoides chronica), pink, nonpurpuric, scaly papules predominate. For decades, authors of textbooks of dermatol…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Palpable Purpura?

…ting of reddish papules, scaly papules, vesicles, ulcers, and scars, often displays purpuric papules. The papules are formed mostly by infiltrates of lymphocytes around venules of both vascular plexuses and along the dermoepidermal junction. The purp…

Histologic Diagnosis of Inflammatory Skin Diseases

Beh├žet’s Disease

…les tend to ulcerate and to heal with atrophic hyperpigmented scars. Findings histopathologic Infiltrate of lymphocytes around venules in the reticular dermis and the subcutaneous fat Neutrophils with variable amounts of nuclear “dust”…

Differential Diagnosis in Dermatopathology

Discussions

…followed by fibroplasia, they tend to resolve with depressed scars. Like all other manifestations of discoid lupus erythematosus, lupus profundus is evidence of a systemic disease. The sclerotic mummified panniculus adiposus so characteristic of the…

Differential Diagnosis in Dermatopathology

Photoallergic dermatitis vs. Phototoxic dermatitis

Alterations in the skin and subcutaneous fat, such as pigmentation and induration, secondary to the effects of long-term stasis, and ulcers that occur on the lower part of the legs as a consequence of the effects, combined, of incompetent valves of…

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