Search Results for: urtica

Histologic Diagnosis of Inflammatory Skin Diseases

Leukocytoclastic vasculitis

…beneath a subepidermal blister Correlation clinicopathologic Urticarial papules are formed mostly of edema in the papillary dermis, as well as by the perivascular and interstitial infiltrate of neutrophils. When erythrocytes become extravasated in n…

Differential Diagnosis in Dermatopathology

Leukocytoclastic vasculitis vs. livedo vasculitis

An inflammatory process that consists of transient, slightly erythematous, edematous papules and plaques characterized by a pseudopod-like border. They may be of either allergic or non-allergic cause, among the former being ingestants, injectants, i…

Histologic Diagnosis of Inflammatory Skin Diseases

The Algorithmic Method

….28), and of lymphocytes, neutrophils, and eosinophils, as in urtica (see Fig. 5.123). Figure 6.1 A&B. Identification of lymphocytes at scanning and high magnifications. Lymphocytes in this lesion of pernio, an expression of lupus erythematosus,…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…dermis and in the acanthotic epidermis = Bullous pemphigoid, urticarial Eosinophils in the epidermis induce spongiosis that, at times, leads to formation of spongiotic vesicles. Uncommonly, a blister in bullous pemphigoid is entirely intraepidermal….

Differential Diagnosis in Dermatopathology

Discussions

…widespread or confined to a single anatomic site. They may be urticarial and without even a hint of purpura, or they may be strikingly hemorrhagic. So-called urticarial vasculitis is merely leukocytoclastic vasculitis devoid of purpura. Perhaps the m…

Histologic Diagnosis of Inflammatory Skin Diseases

Bullous pemphigoid

…of lesions Arcuate, annular, and serpiginous when lesions are urticarial especially Arrangement of lesions Scattered and discrete, but becoming confluent in time Individual lesions Urticarial papules and plaques early, vesicles and bullae later, and…

Histologic Diagnosis of Inflammatory Skin Diseases

Herpes gestationis

…Configuration of lesions Arcuate, annular, and serpiginous of urticarial lesions especially Arrangement of lesions Vesicles often in the shape of a cockade Individual lesions Urticarial papules, plaques, vesicles, bullae, and crusts; tense vesicles o…