Search Results for: urtica

Histologic Diagnosis of Inflammatory Skin Diseases

Limitations of the Algorithmic Method

…is for the entire duration of it, no matter how short, e.g., urtica, or how long, e.g., necrobiosis lipoidica. Just as the seasons influence the color and patterns of birds, so, too, do age, race, anatomic site, and immunologic status of a person wh…

Differential Diagnosis in Dermatopathology

Urticaria vs. Urticarial lesions of bullous pemphigoid

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

Selection of the Site

…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 interstitial infiltrate of neutrophils and some nuclear “dust&#8221…

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….

Histologic Diagnosis of Inflammatory Skin Diseases

Arthropod assaults

…sect “bite” Bug bite Insect bite reaction Papular urticaria Lichen urticatus Strophulus Presentation stereotypical Age and sex Any age and both sexes Distribution of lesions At times only a single lesion and at other times lesions, someti…

Differential Diagnosis in Dermatopathology

Discussions

Urticaria and the urticarial stage of bullous pemphigoid have several findings histopathologic in common, chiefly superficial and mid- or deep dermal perivascular and interstitial mixed-cell infiltrates in which eosinophils are prominent in the inte…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Urticarial Vasculitis?

…atients has been defined in whom all of the skin lesions were urticarial. Microscopic examination of skin biopsy specimens showed fibrinoid necrosis of the blood vessel walls, an infiltrate containing polymorphonuclear leucocytes, fragmentation of ce…

Differential Diagnosis in Dermatopathology

Discussions

Pruritic urticarial papules and plaques of pregnancy (PUPPP) and a superficial response to an assault by an arthropod are inflammatory diseases that share many features clinical and findings histopathologic. When viewed through a conventional micros…

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 subepiderm…

Differential Diagnosis in Dermatopathology

Images

Urticarial reaction to an arthropod assault Urtica