Search Results for: scale-crust

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Cutaneous T-cell Lymphoma?

…iolaceous, or orange; the patches may be surmounted by a fine scale. A somewhat irregular or notched border may help differentiate early CTCL from clinically similar benign dermatoses, as may a discrete area of uninvolved skin within a larger lesion…

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

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,…

Histologic Diagnosis of Inflammatory Skin Diseases

Fixed drug eruption

…junction, melanophages, individual necrotic keratocytes, and scalecrust beneath a normal cornified layer = Fixed drug eruption These are not the changes of erythema multiforme because of the depth of the infiltrate of lymphocytes and the presence o…

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…

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

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…