Search Results for: dermatophytosis

Differential Diagnosis in Dermatopathology

Discussions

…gic in sections stained by hematoxylin and eosin. The presence of hyphae in the cornified layer establishes the diagnosis of dermatophytosis. The other five conditions cannot be differentiated histopathologically from one another. Some patients may…

Uncommon presentations of tinea versicolor

Uncommon presentations of tinea versicolor

…a R, Bluhm R, Faergemann J. Pityriasis versicolor. Dermatol Clin. 2003;21(3):413-429, v-vi. Mendez-Tovar LJ. Pathogenesis of dermatophytosis and tinea versicolor. Clin Dermatol. 2010;28(2):185-189. Roberts SO. Pityriasis versicolor: a clinical and…

Differential Diagnosis in Dermatopathology

Allergic contact dermatitis vs. Irritant contact dermatitis

An inflammatory process caused by superficial fungi, i.e., fungi situated superficially in the cornified layer and in other cornified structures, and expressed clinically as smooth-surfaced papules, scaly papules, scaly plaques, nodules, pustules,…

Histologic Diagnosis of Inflammatory Skin Diseases

Leukocytoclastic vasculitis

…atter of hours. Blisters in leukocytoclastic vasculitis, like those of diseases as disparate as allergic contact dermatitis, dermatophytosis, responses to assaults by arthropods, Mucha-Habermann disease, and erysipelas, may be either intraepidermal,…

Histologic Diagnosis of Inflammatory Skin Diseases

Prurigo pigmentosa

…r zone, just below the stratum corneum, and at the summit of mounds of parakeratosis. No ballooning of keratocytes. Pustular dermatophytosis: Findings just like those in eruptive psoriasis, save for the presence of hyphae in the cornified layer….

Histologic Diagnosis of Inflammatory Skin Diseases

Pemphigus vulgaris

…perficial perivascular and interstitial mixed-cell infiltrate is a clue to an urticarial lesion of pemphigus vulgaris and to dermatophytosis. Neutrophils are encountered less often than eosinophils in urticarial lesions of pemphigus vulgaris….

Differential Diagnosis in Dermatopathology

Discussions

…ted doses for treatment of cutaneous malignancies and, in former times, for inflammatory processes such as acne vulgaris and dermatophytosis. The less common circumstance follows long-term exposures to radiation at lower doses and represents an…

Histologic Diagnosis of Inflammatory Skin Diseases

Lymphocytoma cutis

…dermatitis Lichenoid purpura of Gougerot and Blum Various inflammatory diseases episodically, as dissimilar as psoriasis and dermatophytosis Findings histopathologic Simulators of B-cell lymphoma Fully developed Nodular and/or diffuse infiltrate…

Histologic Diagnosis of Inflammatory Skin Diseases

Incontinentia pigmenti

…Other diseases marked by large numbers of eosinophils in the epidermis are erythema toxicum neonatorum and rare examples of dermatophytosis. Unlike incontinentia pigmenti, erythema toxicum neonatorum is not a spongiotic dermatitis; it seems to be a…