Search Results for: actinic squamous-cell

Differential Diagnosis in Dermatopathology

Seborrheic keratosis, acanthotic type vs. Eccrine poroma

…f atrophy, e.g., in a congenital expression that takes the form of a plaque (Mibelli), in a congenital manifestation in which lesions are in linear array (segmental), in an acquired type induced by ultraviolet light (disseminated superficial…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Lentigo?

…ic macule (labial lentigo) are similar to solar lentigo, according to one study, showing melanocytic hyperplasia but without cellular atypia.” Rhodes AR. Neoplasms: benign neoplasias, hyperplasias, and dysplasias of melanocytes. In:…

Strategies for early recognition of cutaneous melanoma-present and future

Strategies for early recognition of cutaneous melanoma-present and future

…dermis or within the basal layer of non-edged papillae. The four minor criteria were represented by the presence of roundish cells in superficial layers spreading upward in a pagetoid fashion, pagetoid cells widespread throughout the lesion,…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Parapsoriasis?

…ermatosis, which has also been called fingerprint parapsoriasis or digitate parapsoriasis.” Gibson LE, Perry HO. Papulosquamous eruptions and exfoliative dermatitis. In: Moschella SL, Hurley HJ, eds. Dermatology, 3rd ed. Philadelphia: W. B….

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Keratosis Lichenoides Chronica?

…at despite the unity of the two diseases, there were some differences between them histopathologically, namely, inflammatory cells around follicles and irregular epidermal growth in the former, and inflammatory cells only in dermal papillae with…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…f porokeratosis are taller and broader than those in acquired lesions of porokeratosis, such as the disseminated superficial actinic type. They are cornoid lamellae, nonetheless, because the columns of parakeratosis appear to descend through a…

Differential Diagnosis in Dermatopathology

Discussions

…ormation of “squamous eddies” to development of nuclear abnormalities that may simulate vaguely the kind seen in squamouscell carcinoma. Of the three major patterns of seborrheic keratoses, namely, acanthotic, adenoid (reticulate), and…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…10.43.17B: Histiocytes in a palisade around a focus that consists of deposits of mucin, fibrin, and necrosis of inflammatory cells = Granuloma annulare, subcutaneous The fundamental attributes morphologic of granuloma annulare are the same in the…

Histologic Diagnosis of Inflammatory Skin Diseases

Photoallergic dermatitis

…ight focal spongiosis Scale-crusts Correlation clinicopathologic Papules consist of perivascular infiltrates of inflammatory cells, edema of the papillary dermis, and foci of spongiosis; blisters are expressions of spongiotic vesiculation….