Histologic Diagnosis of Inflammatory Skin Diseases

Elastic Fibers

…illary dermis are present either as bundles of microfibrils, oxytalan fibers, or as cross-linked elastin on one hand or as elaunin fibers on the other. In the reticular dermis, elastic tissue appears mainly as elastin. Normal elastic fibers, which co…

Histologic Diagnosis of Inflammatory Skin Diseases

Eccrine Units

…prepuce, but not the oral lips, clitoris, labia minora, and external auditory canals. They are most populous on the palms, soles, axillae, and forehead. Embryologically, eccrine units derive from surface ectodermis, arising independent of infundibul…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Normal, Typical, Ordinary, Banal, and Common Nevus?

…ber AJ, Hernandez MH. Precursor lesions of melanoma: do they exist? Semin Surg Oncol 1992;8:358-65. “. . . the gold standard for distinguishing between banal and dysplastic nevi should be criteria that are linked with melanoma risk . . .&#8221…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Papulosquamous Diseases?

…s, lichen striatus, and lichen sclerosus et atrophicus. Paradoxically, “early” lesions of each of those diseases are neither papular nor scaly; they are macular and smooth. For example, incipient lesions of psoriasis, seborrheic dermatiti…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eosinophilic Cellulitis (Wells’ Syndrome)?

…derlying diseases of causative agents and thus are different expressions of one disease entity linked to the immunobiology of eosinophils.” Bogenrieder T, Griese DP, Schiffner R, B?ttner, Riegger GA, et al. Wells’ syndrome associated wit…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Pustular Dermatitis

…that compose it emerge from capillaries of the superficial plexus and from them migrate to, and through, epidermal epithelium. It is inaccurate, therefore, to characterize a pustule positioned in an infundibulum (Fig. 5.310) as “folliculitis&#8…