An actinic keratosis aktinik keruhtoesis is a rough, scaly patch on your skin that develops from years of exposure to the sun. Basal cell carcinoma bcc of skin is a malignant cancer affecting the skin. Primary lesions macule patch papule plaque nodule tumor vesicle bulla pustule cyst secondary lesions scale crust excoriationlichenificationmaceration fissure erosion ulcer distinct lesions whealhive burrow comedone atrophy keloid fibrosis petechiae telangiectasis milium patch. While a macule may have an appearance suggestive of cancer, further tests would be needed to confirm or exclude a diagnosis. Fundamentals of dermatology describing rashes and lesions. A skin plaque is an elevated, solid, superficial lesion that is typically more than one centimeter in diameter a little more than half an inch and associated with a number of skin conditions, most commonly psoriasis. Commonly located on the scalp, elbows, knees, and lower back. Macules are circumscribed alterations in skin color.
Definition chv, a patch of skin that is discolored but not usually. It typically affects the forehead, cheeks, and nose. Aging leads to skin atrophy, including subcutaneous lipoatrophy, striae atrophicae. A skin lesion is a superficial growth or patch of the skin that does not resemble the area surrounding it. Skin lesions definition of skin lesions by medical dictionary. Macules are flat, nonpalpable lesions usually 1 cm. Apr 21, 2020 a patch is a primary lesion that is similar to the macule, but takes up a bigger area of the skin. Fundamentals of dermatology describing rashes and lesions camls. Dermatology is the branch of medicine concerned with the skin, hair, and nails, as well as the conditions associated with. The typical actinic keratosis ak is a dry, scaly, rough bump that is skincolored to reddish brown. The skin appears dry and cracked, though skin dryness isnt always to blame. Identifying the primary lesions, whenever possible, is the first step towards identification of the disease or cutaneous process.
Scaling skin is the loss of the outer layer of the epidermis in large, scalelike flakes. Primary lesions include the macule, papule, patch, plaque, vesicle, bulla, nodule, tumor, wheal, and pustule. This is a chronic skin condition that can cause raised patches of red skin and pusfilled lesions. Patches are generally larger than one cm, while a macule is typically smaller than one cm. Squamous cell carcinoma of the skin is a common form of skin cancer that develops in the squamous cells that make up the middle and outer layers of the skin. Skin lesions come to the attention of the physician in three ways. The word plaque is french for plate which is fitting because the lesions often look like miniature dirty plates. Dermatology term definition what is a macule flat skin. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Primary lesion a lesion directly associated with the disease process that is described with established dermatological terminology. Squamous cell carcinoma of the skin symptoms and causes. To do that, you need to know how to describe a lesion with the associated language.
The term actinic keratosis can be literally understood as a disorder of epidermal keratinocytes that is induced by ultraviolet uv light exposure. A papule, a bulla, and a vesicle are all small, raised lesions on top of the skin. It affects the squamous cells, which are in the outermost layer of skin, and is sometimes referred to as squamous cell carcinoma in situ. Squamous cell carcinoma of the skin is usually not lifethreatening, though it can be aggressive. A plaque is a circumscribed, palpable lesion more than 1 cm in diameter. It can be the result of sunlight, genetics, or age and will not usual need to be treated. A skin lesion can be a rash, mole, wart, cyst, blister, bump, discoloration, or other change that you may notice on your skin. Macule, papule, patch, plaque, vesicle, bulla, and others. Skin lesions definition of skin lesions by medical. If the lesion is flat, then it will be either a macule or patch. Study w definition first quizlet does not allow the term to be a picture. Derived from the latin root cutis, which means skin, these lesions are superficial and can be rough, smooth, leatherlike, or raised.
Typically less than 2 cm, or about the size of a pencil eraser. Authoritative facts about the skin from dermnet new zealand. Medical dictionaries define skin lesion as a superficial growth or patch of the skin that does not resemble the area surrounding it. Skin lesion definition of skin lesion by medical dictionary. Skin atrophy is when skin becomes thin or has a smooth or finely wrinkled surface figs. Examples include freckles, flat moles, tattoos, and portwine stains, and the rashes of rickettsial infections, rubella, measles can also have papules and plaques, and some allergic drug eruptions. A macule is not, in and of itself, a sign of skin cancer. All told, there are four types of skin cancer or precancer, each with its own characteristics appearance.
Learning the language the diagnosis of any skin lesion starts with an accurate description of it. Patch flat lesion greater than 1 cm, without elevation or depression. Patch definition is a piece of material used to mend or cover a hole or a weak spot. A skin lesion is a part of the skin that has an abnormal growth or appearance compared to the skin around it. Description skin lesions can be grouped into two categories. Description of skin lesions dermatologic disorders merck. A nodule is a solid lesion with a deeper cutaneous involvement. A medicated adhesive patch placed on the skin to deliver a specific dose of medication into the bloodstream. The diagnosis of any skin lesion starts with an accurate description of it. The lesion may range from the size of a pinhead to larger than a quarter.
A secondary lesion is an eruption that occurs secondarily after a primary or other skin lesion. Definition nci a patch intended for administration to the skin. Primary skin lesions are variations in color or texture that may be present at birth, such as moles or birthmarks, or that may be acquired. Nov 24, 2017 seborrheic keratosis is a common, harmless, pigmented, noncancerous growth on the skin. The typical actinic keratosis ak is a dry, scaly, rough bump that is skin colored to reddish brown. Primary skin lesions are variations in color or texture that may be present at birth, such as moles or birthmarks, or that may. Cyst papule or nodule that contains fluid or semifluid material so is fluctuant. All told, there are four types of skin cancer or precancer, each with its. Skin lesion reference guide bulla circumscribed collection of free fluid, 1 cm macule circular flat discoloration, 1cm. Description of skin lesions dermatologic disorders. Description of skin lesions merck manuals professional edition. Benign skin lesions are noncancerous skin growths that that may be pointed out by the patient or discovered during routine skin examinations. Skin lesions definition a skin lesion is a superficial growth or patch of the skin that does not resemble the area surrounding it.
Benign skin lesions knowledge for medical students and. It is a slowgrowing tumor generally observed in older individuals, in both men and women this malignant carcinoma, which may be present as a lesion on the sunexposed areas of the body. It is a slowgrowing tumor generally observed in older individuals, in both men and women this malignant carcinoma, which may be present as a lesion on the sunexposed areas of the body, has the potential to metastasize spread to the lymph nodes. The secretory function is reduced, and the skin surface dries. If it is macular, you cannot feel the involved area. Bowens disease is a very early form of skin cancer thats easily treatable. A skin lesion is a broad term that refers to any abnormality on your skin. Accurately diagnosing a benign skin lesion and distinguishing it from a malignant condition requires consideration of the physical and histological characteristics of the lesion as well as the patients attributes and overall condition. Skin lesions actinic keratosis marietta dermatology. The skin surface is neither elevated or depressed in relation to the surrounding skin. Definition a skin lesion is a superficial growth or patch of the skin that does not resemble the area surrounding it. Morphology the form or structure of an individual skin lesion.
A patch is a large macule equal to or greater than either 5 or 10 mm across, depending on ones definition of a macule. Description of skin lesions and dermatologic disorders learn about from the merck manuals medical professional version. Macule a small patch of skin that is altered in colour but is not elevated. Macules are flat, nonpalpable lesions usually skin surface. Actinic keratosis ak, sometimes called solar keratosis or senile keratosis, is a precancerous area of thick, scaly, or crusty skin. Ageing skin cme epidemiology of nonmelanoma skin cancer squamous cell carcinoma cme basal cell carcinoma cme benign melanocytic lesions melanoma nonmelanocytic congenital naevi benign keratinocytic and adnexal lesions dermal and subcutaneous lesions introduction to skin surgery processing skin biopsies surgical procedures nonsurgical physical. The greatest portion of the lesion may be above or beneath the skin surface. Patches may have some subtle surface change, such as a fine scale or wrinkling, but although the consistency of the surface is changed, the lesion itself is not palpable. Macule definition is a patch of skin that is altered in color but usually not elevated. Key descriptive elements 1 definition and morphology of the lesion, 2 location. Macule flat lesion less than 1 cm, without elevation or depression. Its most commonly found on your face, lips, ears, back of your hands, forearms, scalp or neck. Dec 12, 2018 home medterms medical dictionary az list skin center lesion definition medical definition of lesion medical author.
Some skin colored aks may be easier to feel than see. That is, with your eyes closed, you cannot discern a boundary to the lesional area. Flat, nonpalpable lesion with color change hyper or hypopigmented, erythematous less than 510mm larger than 510mm patch freckles, flat nevi morphology. Principles of dermatology knowledge for medical students and.
Distribution refers to how the skin lesions are scattered or spread out. Principles of dermatology knowledge for medical students. Birthmarks are patches of discoloration that people have when they are born. Apr 17, 2020 a cutaneous lesion is a patch of skin that contrasts with surrounding tissue due to differences in texture, thickness, and pigment.
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