Atlas of Skin Pathology by Ronald Marks, Arthur Knight, P. Laidler (auth.)

By Ronald Marks, Arthur Knight, P. Laidler (auth.)

Dermatopathology is either interesting and exasperating. tum corneum cells. this happens in issues of keratiniza­ pores and skin has a sublime simplicity in its features but a tion as the means of desquamation is disturbed (Figure 1. 1). ferocious complexity in its constitution. this is often one of many paradoxes that underly the pathology of dermis ailment Parakeratosis. The presence of nucleated horn cells in and should move a way in explaining the multitudinous the stratum corneum. often the horn cells (corneocy­ problems to which the surface is topic. The prepared visibility tes) are skinny lamellae of below 1 f. lm thickness. They of the surface can assist clarify why straight forward comprise no detectable cytoplasmic contents as those are histological exam can't continuously supply an misplaced within the granular mobilephone layer. Parakeratosis happens whilst resolution to a clinicians's query. particularly dramatic seem­ the method of keratinization is disturbed comparable to whilst ances will be as a result of adjustments of the relative charges of the speed of epidermal mobile construction is elevated (as in blood circulate, without or with oedema, within the assorted psoriasis) in order that nuclei usually are not damaged down sooner than the vascular plexuses or round varied constructions within the stratum corneum is reached and while harm happens horizontal size, neither of which could bring about to the higher skin (Figure 1. 2). 'much to determine' histologically. The inherent sampling blunders Porokeratosis.

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Viral diseases of the skin, 1975. A 25 year perspective. J. Invest. , 67, 169 3. , Hagedorn, M. et al. (1982). ) type and histology of warts. J. Invest. , 78, 160 4. , Breitbard, F. et al. (1978). The human papilloma viruses. Bu/l. Cancer, 65, 151 5. , Marks, R. and Wilson-Jones, E. (1975). Secondary syphilis. A clinico-pathological review. Br. J. , 93, 53 6. Montgomery, H. (1937). Histopathology of the various types of cutaneous tuberculosis. Arch. Dermatol. , 35, 698 7. S. (1974). Histological classification and the immunological spectrum of leprosy.

The dermis is oedematous with sparse infiltrate. Accurale localization of the split demands electron microscopy. 2 Hailey-Hailey disease. Separation of epidermal cells both singly and in clumps . The separation is above the basal layer and there is some 'delapidated brick wall' appearance. 3 Pemphigus vulgaris . Suprabasal cleft, acantholytic cells in roof of blister. Basal cells form the base of the blister. Dermal infiltrate of lymphocytes and some eosinophils. 4 Pemphigus vulgaris. Suprabasal cleft (floor of blister lined by basal cells) and floor of blister interrupted by upward 'villous' projections.

Epithelioid cell granulomata in mid dermis with little surrounding lymphocytic infiltrate. The granulomata resemble sarcoidosis but are around cutaneous nerves. 19 Dermatophyte infection of hair. Note the hyphal filaments almost reaching the hair matrix. 20 Dermatophyte infection. Note hyphae limited to stratum corneum and stained black. Grocott's silver stain. 21 Nocardiasis. Clumps of organisms (granules) surrounded by neutrophils. This picture is very similar to that seen in Actinomycosis. 22 Mucormycosis.

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