Search Results for: urtica

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

Selection of the Site

…d an infiltrate of lymphocytes in the dermis that is both deep as well as superficial and V shaped. Study histopathologic of urticarial papules of leukocytoclastic vasculitis, i.e., ones devoid of purpura, reveals a sparse perivascular and…

Histologic Diagnosis of Inflammatory Skin Diseases

Arthropod assaults

…“bite” of an insect may persist for months; vigorous rubbing of such papules may induce urtication anew Papular urticaria (lichen urticatus, strophulus) refers to widespread edematous papules and papulovesicles thought in times past to…

Differential Diagnosis in Dermatopathology

Discussions

…deep, perivascular and interstitial, wedge-shaped infiltrates. PUPPP may have some attributes histopathologic in common with urtica, namely, sparse perivascular and interstitial mixed-cell infiltrates of lymphocytes and eosinophils. Unlike the…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Urticarial Vasculitis?

…manifestations clinical, one of which is urticarial. A clear distinction must be made between urticarial vasculitis and true urticaria. Lesions of urtica differ by being evanescent and devoid of nuclear “dust” of neutrophils and of…

Differential Diagnosis in Dermatopathology

Discussions

…hils are prominent in the interstitium and lymphocytes around venules. The cardinal signs that enable the differentiation of urticaria from urticarial lesions of bullous pemphigoid to be accomplished are as follows: in the former, the absence of…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…Images 10.31.1A: Perivascular and interstitial dermatitis + 10.31.1B: Lymphocytes and neutrophils in the dermis = Erythema marginatum The changes of erythema marginatum differ from those of urtica developed fully by absence of eosinophils….

Differential Diagnosis in Dermatopathology

Images

Urticarial reaction to an arthropod assault Urtica

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Urticarial reaction to an arthropod assault Urtica 1. Marked edema of the papillary dermis sometimes 1. No edema noticeable in the papillary dermis 2. Subepidermal vesicle sometimes secondary to marked edema of the papillary dermis 2. No…