Search Results for: crust

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Vesicular Dermatitis

…d layer is recognized to be psoriasis because mounds of scale-crust, some them containing neutrophils, are staggered in periodic fashion diagnostic of psoriasis (Fig. 5.262 A&B). Yet another pitfall is posed by vesiculopustular lesions of psorias…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…orm + 10.2.1B: Slight edema of the papillary dermis and scale-crust = Nummular dermatitis  Changes such as these are indistinguishable from those of allergic contact dermatitis. The psoriasiform acanthosis is more than usually is seen in pityriasis r…

Dermatology Practical & Conceptual

Dermoscopic findings in reactive perforating collagenosis

…characterized by umbilicated papules and plaques with central crusted ulceration. Pruritus is the most common symptom of RPC, and the lesions are most commonly found on the extensor surfaces of the extremities. This entity is histopathologically char…

Dermatology Practical & Conceptual

Saved by step sections: an unusual presentation of basal cell carcinoma

…2A, 2B, 2C) showed a well-demarcated area of ulceration with crust. Adjacent epidermis depicted irregular acanthosis and prominent spongiosis with inflammatory cells in exocytosis; superficial and mid-dermis presented a dense inflammatory infiltrate…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Reactive Perforating Collagenosis?

…ace, where they reside temporarily in a neutrophil-containing crust atop an ulcer. In sections stained by hematoxylin and eosin, degenerated bundles of collagen appear blue rather than the usual red, and are found not only in the upper part of the de…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…lar dermatitis, psoriasiform + 10.22.2B: Neutrophils in scale-crust and hyphae in the original cornified layer situated above the scale-crust = Dermatophytosis Infection by superficial fungi may simulate psoriasis, as is the case here, the crucial at…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…, lichenoid + 10.25.4B: Predominance of lymphocytes and scale-crust atop an erosion = Lichenoid drug eruption Even at scanning magnification, a determination can be made that the diagnosis is not lichen planus, the evidence against it being the focus…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…te ridges of about equal length, marked spongiosis, and scale-crusts arrayed in staggered fashion = Psoriasis, fully developed  On volar skin, psoriasis often is associated with prominent spongiosis and, sometimes, spongiotic vesicles that release la…