Histologic Diagnosis of Inflammatory Skin Diseases

Atypical mycobacterial infections

Atypical mycobacterial infections Presentation stereotypical Age and sex Any age, but more often in young adults, particularly men and those who are immunocompromised Distribution of lesions Localized to a circumscribed site, that being the one of i…

Histologic Diagnosis of Inflammatory Skin Diseases

Lupus vulgaris

Lupus vulgaris Findings histopathologic Fully developed Collections of epithelioid histiocytes in the upper half of the dermis, some impinging on the epidermis, which is thinned Dense infiltrates of lymphocytes surrounding granulomas Fibrosis and t…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Anagen Effluvium?

“The follicle tends to respond in an all or none fashion with the notable exception of its response to cancer chemotherapy agents. This is the only known instance in which hair is lost follicles which continue in their growing phase without b…

Dermatology Practical & Conceptual

Study By Disease

“Blue nevus” (Jadassohn-Tièche) (Quiz #360) “Blue nevus” (Jadassohn-Tièche) (Quiz #525) “Blue nevus” (Masson’s blue neuronevus) (Quiz #359) “Collagenous” nevus, papillary dermal type* (Quiz #11…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Atrophoderma?

“Atrophoderma, or atrophia cutis. Atrophy of the skin may be quantitative or qualitative; idiopathic or symptomatic; diffused or circumscribed. Crocker gives this useful table: Pigmentosum Juvenilis Albidum Diffusum Senilis…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Keratosis Lichenoides Chronica?

“So we have to start once more [in regard to what is the authentic nature of lichen rubra moniliformia], returning to the old case of Kaposi by which the question began in 1886.” Pinkus H. Lichen ruber moniliformis Kaposi. Arch Dermato…

Differential Diagnosis in Dermatopathology

Discussions

…natus faciei, and acnitis were wrongly presumed to be forms of tuberculosis. Today, those conditions are recognized to be variants of rosacea and to be unrelated to tuberculosis. The mechanisms that lead to development of acne vulgaris, although not…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Focus of Infection?

“. . . we are justified in arranging, provisionally at least, the dermatoses possibly due to focal infection in six groups, as follows: Group 1: Those considered in some relation with arthropathy:            1, erythema nodosum; 2, erythema…