<\/span><\/h2>\nDermatopathology is a subspecialty of pathology<\/span>.<\/p>\n\n- Pathology is the study of diseases. It includes the study of the causes, course and progression and complications arising from the disease.<\/li>\n
- Anatomical pathology, or histopathology<\/span>, refers to the study of structural and compositional changes that occur in organs and tissues as a result of disease.<\/li>\n
- A pathologist<\/span> is a physician trained in anatomical pathology who examines, describes, and interprets pathologic specimens to arrive at a specific finding or diagnosis.<\/li>\n
- Dermatopathology is the study and description of structural and compositional changes that occur in skin diseases.<\/li>\n<\/ul>\n
From a practical point of view, dermatopathology involves microscopic<\/span> examination, description and interpretation of biopsy<\/span> samples obtained from the skin. This is usually done by a general pathologist (who may or may not have received specific training in dermatopathology) or a dermatopathologist<\/span> (a physician specifically trained in dermatopathology, but who may not have fully trained in anatomical pathology). Dermatologists often have clinical training. dermatology<\/span>.<\/p>\nInterpreting skin samples can be complicated and difficult, as many inflammatory<\/span> Skin diseases share the same basic inflammatory process or pattern. The final diagnosis requires clinical input and clinicopathological<\/span> correlation.<\/p>\n<\/span>How are skin biopsy samples examined?<\/span><\/h2>\nThe skin biopsy samples are processed and then stained with hematoxylin and eosin (H&E). Eosin is acidic in nature and stains the basic \/ alkaline \/ acidophilic structures red \/ pink. Hematoxylin is alkaline and the spots are acidic \/ basophilic<\/span> structures (eg deoxynucleic acid, ribonucleic acid<\/span> inside the cell nuclei<\/span>) blue. Depending on the observed dermatopathological pattern and \/ or clinical characteristics, special stains may be requested to identify the agents that cause the condition (eg. bacteria<\/span> or fungi), specific substances deposited on the skin (eg. amyloid<\/span>iron or melanin<\/span>) or specific markers to identify the origin, nature and distribution<\/span> of cells in the sample being examined.<\/p>\nThe specimen is systematically examined by observing the structure of the epidermis<\/span>, dermis<\/span>, subcutis<\/span>, fascia<\/span> and underlying structures. Based on the findings, the pathologist can reach a definitive diagnosis or list various possible explanations, creating a differential diagnosis<\/span>. The integration of clinical information along with pathological findings generates the final diagnosis, or lists several possible explanations, creating a differential diagnosis. The integration of clinical information together with pathological findings generates the final diagnosis.<\/p>\n\n
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<\/span>Possible errors in diagnosis.<\/span><\/h2>\nPathologists depend on the doctor to provide a good history and differential diagnosis, and their work is easier with a large biopsy sample than with a small one. Even then, the sample may not be representative of the disease as a whole.<\/p>\n
\n- The biopsy may have been removed injury<\/span>.<\/li>\n
- The biopsy may not contain diagnostic material.<\/li>\n
- The biopsy can be fragmented or crushed.<\/li>\n
- There may be processing errors.<\/li>\n
- An incorrect diagnosis may arise due to lack of information on the application form.<\/li>\n
- the microscopy<\/span> It may seem normal despite a fairly obvious clinical illness.<\/li>\n
- The changes may be too subtle to diagnose if the injury is too early to develop.<\/li>\n
- Dark secondary changes primary<\/span> pathology. These include excoriation<\/span>, ulceration<\/span>healing infection<\/span>, necrosis<\/span> and fibrosis<\/span>.<\/li>\n
- The thin section examined by the pathologist may not contain any part of the lesion present in another portion of the original sample. In this case, a less<\/em> The biopsy sample could have led to the diagnosis. <\/li>\n
- Dense cellular<\/span> infiltration<\/span> it can obscure the presence of another pathological characteristic, avoiding its identification.<\/li>\n
- Two very different skin conditions can look similar under a microscope.<\/li>\n<\/ul>\n
<\/span>Common inflammatory skin diseases.<\/span><\/h2>\nHistological<\/span> patterns of eczema<\/span>, psoriasis, lichen planus, bullous<\/span> pemphigoid, vasculitis<\/span> and granuloma<\/span> override are described below.<\/p>\n<\/span>\nEczema\/dermatitis<\/span>
\n<\/span><\/h3>\nThe histological characteristics of eczema are:<\/p>\n
\n\n- \nSpongiosis<\/span> in acute<\/span> eczema with associate lymphocyte<\/span> exocytosis<\/span> <\/li>\n
- \nAcanthosis<\/span> in chronic<\/span> eczema<\/li>\n
- \nParakeratosis<\/span> and perivascular<\/span> lymphohistiocytic<\/span> infiltrate<\/span>\n<\/li>\n
- Excoriation and signs of rubbing (irregular acanthosis and perpendicular orientation of collagen<\/span> in dermal<\/span> papillae<\/span>) in chronic cases (lichen simplex). <\/li>\n<\/ul>\n<\/ul>\n\n
<\/span>Eczema \/ dermatitis pathology.<\/span><\/h5>\n<\/section>\n\n\n
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Spongy eczema<\/p>\n
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Chronic lichen eczema<\/p>\n<\/p><\/div>\n<\/section>\n
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<\/span>\nPsoriasis<\/span><\/h3>\nChronic typical pathological features license plate<\/span> psoriasis are:<\/p>\n\n\n- \nHyperkeratosis<\/span> - mainly parakeratosis, some orthokeratosis<\/span>\n<\/li>\n
- \nNeutrophils<\/span><\/span> in stratum corneum<\/span> and scaly<\/span> cell layer<\/li>\n
- Hypogranulosis<\/li>\n
- The epidermis is thin on the dermal papillae.<\/li>\n
- Regular acanthosis, often clubbed