Search Results for: actinic squamous-cell

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

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

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.,…

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

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

Collagen

…m; and those typified by long-standing lichenoid infiltrates of lymphocytes, such as lichen planus, disseminated superficial actinic porokeratosis, and some examples of the lichenoid purpura of Gougerot and Blum (and the neoplastic process, mycosis…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Epidermal Cyst and Epidermoid Cyst?

…helium. “The commonest type of epithelial cyst of the skin is the epidermal cyst which is lined entirely by stratified squamous epithelium usually without skin appendages. . . . These cysts may arise from hair follicles, sebaceous ducts, and…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…d light. 10.38.12A: Nodular dermatitis, granulomatous + 10.38.12B: A band of histiocytes, some of them multinucleate, around squamous epithelium that, in turn, surrounds cellulose = Foreign body reaction to a splinter The splinter came to be…

Differential Diagnosis in Dermatopathology

Photoallergic dermatitis vs. Phototoxic dermatitis

…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…