Search Results for: psoriasis

Histologic Diagnosis of Inflammatory Skin Diseases

Pityriasis rubra pilaris

…te in both vertical and horizontal directions in company with a granular zone that is largely intact. In evolving lesions of psoriasis, by contrast, parakeratosis takes the form of mounds that often have neutrophils at their summit, and the granular…

Histologic Diagnosis of Inflammatory Skin Diseases

Algorithms Predicated on “Nonspecific” Findings

…phocytes = Lichen striatus + Mitotic figures above the basal layer and a dilated tortuous capillary in each dermal papilla = Psoriasis, guttate + Mounds of parakeratosis, individual necrotic keratocytes, lymphocytes along the dermoepidermal…

Histologic Diagnosis of Inflammatory Skin Diseases

Syphilis

…secondary syphilis, among those being the Warthin-Starry, Levaditi, and Steiner. Although both rupial syphilis and pustular psoriasis are marked by spongiform pustules, the two diseases are differentiated easily from one another by the quality of…

Histologic Diagnosis of Inflammatory Skin Diseases

Mycosis fungoides

…e simply variations of a single process and sometimes occur together in the same patient. Not surprisingly, large-plaque parapsoriasis and small-plaque parapsoriasis, being variations on a single theme pathologic, may be present together in the same…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…s can be told to be seborrheic dermatitis because capillaries in dermal papillae are not as dilated and tortuous as those of psoriasis. Spongiosis is present in infundibular, as well as surface epidermis, and serum is more abundant than usually is…

Oyster-shaped hyperkeratotic plaques on the penis

Oyster-shaped hyperkeratotic plaques on the penis

…nemal tests, namely VDRL and TPHA as well as immunohistochemical staining for the human papillomavirus (HPV), were negative. Psoriasis verrucosa (PV) is a rare form of psoriasis, with only a few cases reported in the literature. Lesions are…

Differential Diagnosis in Dermatopathology

Discussions

…e summit of them and by little, if any, acanthosis. Apart from the consideration of dermatophytosis, the changes in eruptive psoriasis are diagnostic of that condition. Fully developed lesions of psoriasis are marked by confluent parakeratosis with…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Colors Stereotypical for Diseases Specific?

…hat dermatologists be alert to the effect of color of normal skin on the color of lesions cutaneous. For example, lesions of psoriasis in Africans, especially when situated on the legs, are purple, and if an observer is not aware of that phenomenon,…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Keratosis Lichenoides Chronica?

…ica resembles atypical lichen planus, lichen verrucosus, generalized Kyrle’s disease, Darier’s disease, and even psoriasis.” Baran R, Panizzon R, Goldberg L. The nails in keratosis lichenoides chronica: characteristics and response…

Differential Diagnosis in Dermatopathology

Discussions

…at times, the epidermis. Edema of the papillary dermis and spongiosis are other indications of the dynamic nature of guttate psoriasis. Guttate parapsoriasis is much more indolent than guttate psoriasis. In sections of tissue from biopsy specimens…