Primary And Secondary Skin Lesions Pdf

primary and secondary skin lesions pdf

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Principles of dermatology

The Dermatology Handbook pp Cite as. This chapter serves as a reference tool for identifying and describing skin lesions in regards to color, distribution, configuration, borders, and shape. In addition, dermatological disorders are categorized based on primary lesion s to help in the differential diagnosis. Skip to main content. This service is more advanced with JavaScript available.

The Basics: Skin Types, Definitions, and Differentials

Primary skin lesions are those which develop as a direct result of the disease process. Secondary lesions are those which evolve from primary lesions or develop as a consequence of the patient's activities. This classification is naturally artificial; the same lesion type might be a primary lesion in one disease but a secondary lesion in another eg alopecia is a primary lesion in canine hypothyroidism [direct consequence of lack of thyroxine] but a secondary lesion in feline flea allergy [caused by the patient: hair removed by the itchy cat]. Do not confuse the term "secondary lesion" with "secondary pyoderma". The latter term implies a bacterial infection which is complicating an underlying skin disease common examples in dogs include allergy or demodicosis but that secondary pyoderma may present with primary lesions such as papules and pustules.

Skin condition

A skin condition , also known as cutaneous condition , is any medical condition that affects the integumentary system —the organ system that encloses the body and includes skin , hair , nails , and related muscle and glands. Conditions of the human integumentary system constitute a broad spectrum of diseases, also known as dermatoses, as well as many nonpathologic states like, in certain circumstances, melanonychia and racquet nails. Clinically, the diagnosis of any particular skin condition is made by gathering pertinent information regarding the presenting skin lesion s , including the location such as arms, head, legs , symptoms pruritus , pain , duration acute or chronic , arrangement solitary, generalized, annular, linear , morphology macules, papules , vesicles , and color red, blue, brown, black, white, yellow. The epidermis is the most superficial layer of skin, a squamous epithelium with several strata : the stratum corneum , stratum lucidum , stratum granulosum , stratum spinosum , and stratum basale. The dermis is the layer of skin between the epidermis and subcutaneous tissue, and comprises two sections, the papillary dermis and the reticular dermis.

Discrepancies in the terminology of elementary lesions persist when texts from Dermatology and Semiology books are compared, which can cause some confusion in both the teaching of undergraduate medical students and the learning acquired by professionals in the field. This review aims to compare and clarify the differences in the description of elementary lesions by many authors, used as references for specialists in dermatology. As regards elementary lesions, used in the teaching of semiology within the Dermatology course, historically, two semantic models were initially described: the Essentialist model, proposed by Robert Willan , followed by Thomas Bateman at the end of the eighteenth century, and the Nominalist model, proposed by Ferdinand Hebra in the nineteenth century.


If your institution subscribes to this resource, and you don't have a MyAccess Profile, please contact your library's reference desk for information on how to gain access to this resource from off-campus. Please consult the latest official manual style if you have any questions regarding the format accuracy. Identification and classification of a patient's skin lesions are important steps in the diagnosis of any skin disorder. The numerous descriptive terms used in dermatology can be overwhelming and at times confusing as there are some variations in the use and meaning of these words in the literature. Using proper terminology to describe skin findings is essential for both documentation and communication with other clinicians. The effort to use precise descriptive terms also encourages a clinician to look with more care and more closely at a patient's skin lesions. The key features of skin lesions are 1 the type of lesion, 2 secondary changes to the surface of the lesion, 3 the color of the lesion, 4 the shape of the lesion, and 5 the arrangement and distribution of the lesions.

Integumentary System. Lesson 3: Primary and Secondary Skin Lesions. Table of Contents.

Secondary lesions are those lesions that are characteristically brought about by modification of the primary lesion either by the individual with the lesion or through the natural evolution of the lesion in the environment. Tasneem Poonawalla, M. Core Concepts of Pediatrics. Secondary lesions Secondary lesions are those lesions that are characteristically brought about by modification of the primary lesion either by the individual with the lesion or through the natural evolution of the lesion in the environment. Atrophy : localized shrinking of the skin which results in paper-thin, wrinkled skin with easily visible vessels. Results from loss of epidermis, dermis or both.

Primary skin lesions are present at the onset of a disease. In contrast, secondary skin lesions result from changes over time caused by disease progression.

Primary Skin Lesions

Строя свои планы, Стратмор целиком полагался на собственный компьютер. Как и многие другие сотрудники АНБ, он использовал разработанную агентством программу Мозговой штурм - безопасный способ разыгрывать сценарий типа Что, если?. на защищенном от проникновения компьютере. Мозговой штурм был своего рода разведывательным экспериментом, который его создатели называли Симулятором причин и следствий. Сначала он предназначался для использования в ходе избирательных кампаний как способ создания в режиме реального времени моделей данной политической среды.

 Коммандер. Стратмор даже не пошевелился. - Коммандер.

The Basics: Skin Types, Definitions, and Differentials


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