Search Results for: urtica

Histologic Diagnosis of Inflammatory Skin Diseases

Leukocytoclastic vasculitis

…ma elevatum diutinum. A problem particularly vexing in differential diagnosis histopathologic is distinguishing between true urtica, on one hand, and the urticarial stage of leukocytoclastic vasculitis, on the other. That differentiation can be…

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,…

Histologic Diagnosis of Inflammatory Skin Diseases

The Algorithmic Method

…side of a suppurative infundibulitis in which the “wall” of the infundibulum has been breached (see Fig. 5.313), urtica, and erysipelas. When eosinophils predominate in the interstitium, the leading cause is the “bite” of an…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…phocytes and many eosinophils in the edematous papillary dermis = Bullous pemphigoid, urticarialUnlike the situation in true urtica, eosinophils in the urticarial stage of pemphigoid ascend from venules of the superficial plexus and often enter the…

Differential Diagnosis in Dermatopathology

Discussions

…n the lumen of them. An early stage in the evolution of leukocytoclastic vasculitis may be confused histopathologically with urtica. In urtica there also is a sparse perivascular and interstitial mixed-cell infiltrate constituted mainly of…

Histologic Diagnosis of Inflammatory Skin Diseases

Bullous pemphigoid

…opathologic Urticarial lesions of bullous pemphigoid misdiagnosed clinically as erythema multiforme: Denominators in common: Urticarial papules and plaques, some of which may be surmounted by vesicles. Features differentiating: Urticarial lesions of…

Histologic Diagnosis of Inflammatory Skin Diseases

Herpes gestationis

…t with serum. Differential diagnosis histopathologic Bullous pemphigoid is indistinguishable from herpes gestationis in both urticarial and blistering stages. Urticarial lesions of pemphigus vulgaris, dermatitis herpetiformis, cicatricial…