By Ronald Marks, Arthur Knight, P. Laidler (auth.)
Dermatopathology is either interesting and exasperating. tum corneum cells. this happens in issues of keratiniza epidermis has a chic simplicity in its services 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 affliction Parakeratosis. The presence of nucleated horn cells in and will pass a way in explaining the multitudinous the stratum corneum. more often than not the horn cells (corneocy problems to which the surface is topic. The prepared visibility tes) are skinny lamellae of under 1 f. lm thickness. They of the surface will help clarify why basic include no detectable cytoplasmic contents as those are histological exam can't regularly offer an misplaced within the granular mobile layer. Parakeratosis happens whilst resolution to a clinicians's query. fairly dramatic seem the method of keratinization is disturbed similar to whilst ances should be as a result of adjustments of the relative premiums of the speed of epidermal telephone creation is elevated (as in blood stream, without or with oedema, within the assorted psoriasis) in order that nuclei will not be damaged down sooner than the vascular plexuses or round various constructions within the stratum corneum is reached and whilst harm happens horizontal size, neither of that can bring about to the higher pores and skin (Figure 1. 2). 'much to work out' histologically. The inherent sampling errors Porokeratosis.
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Additional resources for Atlas of Skin Pathology
Acquired Disorders Pemphigus The blisters of pemphigus are usually flaccid, and are easily disrupted. Bullae may occupy large areas of the skin and include the mucosa of the oral cavity. Two histological types of pemphigus are seen; suprabasal, 49 BULLOUS AND VESICULAR SKIN DISORDERS exemplified by pemphigus vulgaris and superficial, of which pemphigus fo[iaceus is the main example. 3). Acantho[ysis is the characteristic feature which helps to distinguish pemphigus vulgaris from bullous pemphigoid.
A. and Day, S. B. (eds): Comprehensive Immunology, 7, Immunodermatology, pp. 361-376. (New York: Plenum) 2. Pearson. R. W. (1962). Studies on the pathogenesis of epidermolysis bullosa. J. Invest. , 39, 551 3. Anton-Lamprectt, I. (1978). Electron microscopy in the early diagnosis of genetic disorders of the skin. Dermatologica, 157, 65 4. Palmer, D. D. and Perry, H. O. (1962). Benign familial chronic pemphigus. Arch. , 86, 493 5. Beutner, E. H. and Jordon, R. E. (1964). Demonstration of skin antibodies in sera of pemphigus vulgaris patients by indirect immunofluorescent staining.
8 Bullous pemphigoid. Subepidermal blister with intact epidermis forming the roof. Flattened dermis with an infiltrate of eosinophils and neutrophils. 9 Bullous pemphigoid. Direct immunofluorescence of perilesional skin using anti-lgG . Asmooth narrow band is present along the dermoepidermal junction . Also positive with anti-C3. 10 Dermatitis herpetiformis. Pre-bullous skin showing early dermoepidermal separation and papillary collections of neutrophils. 11 Dermatitis herpetiformis. Dermo-epidermal separation in the papillae which are full of neutrophils and nuclear dust.
Atlas of Skin Pathology by Ronald Marks, Arthur Knight, P. Laidler (auth.)