Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Spongiform Pustular Diseases?

…les may appear in conditions as disparate as rupial syphilis, dermatophytosis, candidiasis, halogenodermas, and pyoderma gangrenosum, as well as some other cutaneous manifestations of inflammatory bowel disease. Spongiform pustules are not specific t…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Vesicular Dermatitis

…, as occurs in pustular psoriasis, impetigo, and instances of dermatophytosis, may induce keratocytes to become acantholytic, presumably as a consequence of the effects on those epithelial cells of enzymatic products of the innumerable polymorphs. On…

Histologic Diagnosis of Inflammatory Skin Diseases

Psoriasis

…ntracorneal pustule). Differential diagnosis histopathologic Dermatophytosis may be indistinguishable from psoriasis at every stage in its course chronologic, except for the presence of fungal hyphae in the cornified layer. Dermatophytes also may in…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Distinctive but Nonspecific Findings Using High Magnification

…rurigo nodularis) or abnormal skin (e.g., contact dermatitis, dermatophytosis, and mycosis fungoides). The major features morphologic of atopic dermatitis result from rubbing tenaciously (lichen simplex chronicus) and scratching wildly (neurotic exco…

Histologic Diagnosis of Inflammatory Skin Diseases

Study By Disease

…rosarcoma protuberans (Quiz #885) Dermatomyositis (Quiz #252) Dermatophytosis (Quiz #119) Dermatophytosis (Quiz #701) Dermatophytosis, pustular (Quiz #178) Desmoplastic trichoepithelioma (Quiz #296) Diffuse large B-cell lymphoma (Quiz #387) Diffuse l…

Histologic Diagnosis of Inflammatory Skin Diseases

Tinea nigra

…y the fungi. Differential diagnosis histopathologic Hyphae of dermatophytosis in the cornified layer appear blue in sections stained by hematoxylin and eosin, rather than brown, as is the case for tinea nigra. An infiltrate of inflammatory cells is p…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Anagen Effluvium?

…logic of mycosis fungoides), and infectious processes such as dermatophytosis, to name but a few of them. Despite the illogic of such a classification, it underscores the inherent weakness of using an artificial construct such as anagen effluvium to…

Histologic Diagnosis of Inflammatory Skin Diseases

Mycosis fungoides

…es in the dermis tends to be linear in adnexocentric fashion. Dermatophytosis may be accompanied episodically by numerous lymphocytes in an epidermis that houses little spongiosis, but hyphae are detectable in the cornified layer. Clues to specific…