Search Results for: actinic squamous-cell

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…

Two neutrophilic dermatoses captured simultaneously on histology

Two neutrophilic dermatoses captured simultaneously on histology

…eruption resolved. The skin biopsy showed subepidermal edema (Figure 1a), with no interface damage. There was extensive red cell extravasation in the dermis and an interstitial infiltrate of lymphocytes, histiocytoid cells and predominantly…

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

Polymorphous light eruption

…ons Edematous papules and plaques Course Duration limited by the extent of exposure to ultraviolet light Variations clinical Actinic prurigo is a type of polymorphous light eruption that occurs in Indians of North and South America. Spring eruption…

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….

Histologic Diagnosis of Inflammatory Skin Diseases

Granuloma annulare

…rising that some typical annular lesions would occur on skin damaged chronically by the effects of ultraviolet light. “Actinic granuloma,” at least in our view, merely is a synonym for granuloma annulare situated on skin that has been…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…s, granulomatous + 10.15.2B: Histiocytes in palisaded array around foci of degenerated collagen and necrosis of inflammatory cells in the upper part of the dermis. = Crohn’s disease In addition to the preponderant histiocytes, lymphocytes,…

Histologic Diagnosis of Inflammatory Skin Diseases

Miescher’s granuloma of the face

…nular connective tissue disorder affecting sun- and heat-damaged (elastotic) skin. Arch Dermatol 1975;111:460–66. Steffen C. Actinic granuloma (O’Brien). J Cutan Pathol 1988;15:66–74. Tock CL, Cohen PR. Annular elastolytic giant cell

Histologic Diagnosis of Inflammatory Skin Diseases

Our Definition of “Inflammation” and “Inflammatory Disease”

…matory cells. Fourth, it may not be possible by conventional miscroscopy to determine whether particular cells, e.g., plasma cells, mast cells, histiocytes, and fibrocytes in a particular circumstance are inflammatory or neoplastic, e.g.,…