Search Results for: scale-crust

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema marginatum

…esions that, at their periphery, are topped by collarettes of scale. Urticaria consists of evanescent edematous pink papules and/or plaques that usually are distributed widely and are pruritic. Findings histopathologic Fully developed Superficial per…

Histologic Diagnosis of Inflammatory Skin Diseases

Pattern Analysis in Historical Perspective

…layer (e.g., parakeratosis in mounds that house neutrophils, scalecrusts, hyphae). In regard to blistering diseases, an algorithm that achieves its purpose of enabling diagnosis accurately and with specificity can lead off with “vesicular der…

Differential Diagnosis in Dermatopathology

Discussions

…in mitosis. The epidermis may be thinned centrally and with a crust atop it. The dermis may be involved throughout the width of it, the process sometimes extending into the subcutaneous fat. Hemorrhage and fibroplasia may be present in both condition…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema multiforme

…dermis beneath a subepidermal blister Slight parakeratosis or scalecrust sometimes Correlation clinicopathologic Macules result from spongiosis, ballooning, and a superficial perivascular infiltrate of lymphocytes. Intraepidermal blisters develop se…

Differential Diagnosis in Dermatopathology

Psoriasis vs. Nummular dermatitis

…process being flaccid blisters that give way to erosions and crusts accompanied by erythema. When mostly the trunk is affected, the condition is termed “pemphigus foliaceus,” when mostly the face and upper part of the chest are involved,…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…iasis Nummular Dermatitis 1. Confluent parakeratosis 1. Focal scalecrust 2. Granular zone mostly absent 2. Granular zone mostly present 3. Psoriasiform acanthosis with rete ridges of even length; some rete ridges thinned and some of those markedly 3…

Differential Diagnosis in Dermatopathology

Insect "bite" vs. Lymphomatoid papulosis

…process being flaccid blisters that give way to erosions and crusts accompanied by erythema. When mostly the trunk is affected, the condition is termed “pemphigus foliaceus,” when mostly the face and upper part of the chest are involved,…

Differential Diagnosis in Dermatopathology

Discussions

…carial, often become vesicular, and of-times are covered by a crust. Because the lesions are so pruritic, evidences of excoriation in the form of erosions, ulcerations, and hemorrhagic crusts are expected. In contrast, papules of lymphomatoid papulos…

Histologic Diagnosis of Inflammatory Skin Diseases

Prurigo pigmentosa

…ath a normal cornified layer with a basket-weave pattern Late Scalecrust that houses neutrophils Epidermis slightly acanthotic and parakeratotic Epidermis hyperpigmented Lymphocytes nearly monopolize in a very sparse infiltrate Melanophages range fr…