If the lesion is flat, then it will be either a macule or patch. Below you will find example usage of this term as found in modern andor classical literature. A papule is a raised area of skin tissue thats less than 1 centimeter around. Definition msh a medicated adhesive patch placed on the skin to deliver a specific dose of medication into the bloodstream. A macule is a change in epidermis color, without elevation or depression and, therefore, nonpalpable, well or illdefined 1, variously sized but, by convention, less than ten milimeters in diameter at the widest point. Transdermal patch definition msh a medicated adhesive patch placed on the skin to deliver a specific dose of medication into the bloodstream. Physicians refer to flat skin spots on the skin as macules, as opposed to papules.
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. Apr 24, 2015 macule,papule, vesicle, pustule, plaque terminology of skin lesions according to morphology of lesion as shown in the table lets go in to a bit detail divided in to 4 groups 1. Large macule 1 cm, also used to describe large macule with scale. Erosion of dermis and cutis, with clearly defined edges. Dr amanda oakley, dermatologist, hamilton, new zealand, 1997. Maculues can be caused by any number of things, and may be a cause for concern in some cases, or an utterly unremarkable finding in others.
Morphology the form or structure of an individual skin lesion. Macule, papule, patch, plaque, vesicle, bulla, and others secondary lesion modification of a primary lesion that results from evolution of the primary lesion, traumatic injury, or other external factors. Dec 11, 2018 the word macule comes from the latin macula meaning a small spot or blemish. Papules are further classified by shape, size, color, and surface change. Typically erythematous, but they may be hyperpigmented. Papule a small, solid lesion, dermatology is the branch of medicine concerned with the skin, hair, and nails, as well as the conditions associated with them.
A macule that is greater than 1cm in diameter is technically called a patch. Fundamentals of dermatology describing rashes and lesions. With special reference to social workers by richard clarke cabot 1916 macule means a red or brown spot on. Basic knowledge of dermatology is essential for every physician, as approximately 50% of skinrelated consultations are initially assessed by nondermatologists. Note the macula lutea yellow spot, or simply as the macula, is a spot in the retina where vision is keenest. A macule is a change in skin color, without elevation or depression and. Macules often require no treatment, but laser surgery, cryosurgery, and regular surgical excision of the macule can be. Oct 24, 2008 define macule patch papule plaque nodule cyst vesicle bullae pustule lichenification erythema purpura categories. Doru paul, md, is boardcertified in internal medicine, medical oncology, and hematology. It doesnt involve any change in the thickness or texture of the skin. It usually does not include a change in skin texture or thickness.
Watch this lesson to learn more about what it looks like, what causes it to form, and how to treat it should one form on you. A macule is a spot of discoloration on the skin which is smaller than a third of an inch one centimeter across. Macules are circumscribed alterations in skin color. A discrete, solid, elevated body usually less than or equal to 0. Macule flat lesion less than 1 cm, without elevation or depression. Full article a patch is a large macule equal to or greater than 1cm in diameter.
Macules are completely flat and can only be appreciated by visual inspection and not by touch. A spot, only commonly met in the construct immaculate meaning unspotted. Description of skin lesions dermatologic disorders merck. Definition chv, a patch of skin that is discolored but not usually. Maculues can be caused by any number of things, and may be a cause for concern in. Macule definition of macule at a free online dictionary with. Dermatology for the nondermatologist may 30 june 3, 2018 2 fundamentals of dermatology daniel j. 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 a flat, distinct, discolored area of skin.
Macule, papule, patch, plaque, vesicle, bulla, and others. A circumscribed flat area, up to 1 cm in diameter, differing perceptibly in color from the surrounding tissue. Definition nci a patch intended for administration to the skin. May 04, 2020 a macule is a spot of discoloration on the skin which is smaller than a third of an inch one centimeter across. A macule is a discolored patch of skin that is not elevated and is less than one centimeter in diameter. A patch is a large macule equal to or greater than either 5 or 10 mm across, depending on ones definition of a macule. Principles of dermatology knowledge for medical students and. Macules represent a change in color and are not raised or depressed compared to the skin surface. Plaque a patch or small differentiated area on a body surface or on the cut surface of an organ such as the brain. Description of skin lesions dermatologic disorders. Macule a small patch of skin that is altered in colour but is not elevated.
Figure 3 shows conjoining erythematous macules in a dog with hyperadrenocorticism. Patch a large area of colour change, with a smooth surface. Dermatopathology cornell university college of veterinary. Dermatology is the branch of medicine concerned with the skin, hair, and nails, as well as the conditions. The animal healthy diagnostic center at cornell university is pleased to offer a specialized dermatopathology service. Macules areas of discoloration of the skin, less than 1 cm in diameter. A discolored spot or area on the skin that is not elevated above the surface and is characteristic of certain conditions, such. The goal of this service is to provide high quality interpretation of animal skin biopsy specimens from veterinary dermatologists, general veterinary clinicians, and university veterinary teaching hospitals by board certified veterinary pathologists and. Macule a circumscribed flat area of change in colour of the skin less than 1 cm in diameter. Raised lesion less than 510 mm larger than 10mm plaque or nodule wart, actinic keratosis patch. The term papule is derived from latin from papula, a pimple. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Rashes can have macules, patches flat spots at least 1 cm in size. Here are some common examples of dermatological findings and their associated.
It can appear in a variety of shapes, colors, and sizes. Dermatology term definition what is a macule flat skin. The change in colour may result from pigment loss or excess, erythema, or haemorrhage. Full article macule definition of macule at a free online dictionary with. A macule is a flat, distinct, discolored area of skin less than 1 centimeter cm wide. 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 papule. Nov 26, 2019 a macule is a flat, distinct, discolored area of skin less than 1 centimeter cm wide. Larger areas of discoloration are known as patches. A small, discolored patch or spot on the skin, neither elevated above nor depressed below the skins surface. This entry appears with permission from the dictionary of cell and molecular biology 11 mar 2008 lexicographical neighbors of macule. Macule definition of macule by the free dictionary.
If it is macular, you cannot feel the involved area. Dermatologists call any small solid circumscribed bump in the skin a papule, as opposed to a vesicle which contains fluid or a macule which is flat and even with the surrounding skin. Dichiara, phd, is a former research scientist and published writer specializing in oncology. Dermatology harriet lane handbook unbound medicine. Acuminate pointed domeshaped rounded filiform threadlike flattopped.
Erythematous macules are common in inflammatory diseases of the superficial dermis, such as allergies. Ashleaf macule definition of ashleaf macule by medical. Dermatological diagnoses often have more than one name. The word macule comes from the latin macula meaning a small spot or blemish. Papules are elevated lesions usually macule,papule, vesicle, pustule, plaque terminology of skin lesions according to morphology of lesion as shown in the table lets go in to a bit. In the united states, the most common conditions seen by dermatologists include acne, actinic keratoses. A small discolored patch or spot on the skin, neither elevated above nor depressed below the skins. A discolored spot or area on the skin that is not elevated above the surface and is characteristic of certain conditions, such as smallpox, purpura, or roseola. A macule is a change in skin color, without elevation or depression and, therefore, nonpalpable, well or illdefined, variously sized but, by convention, less than one centimeter in diameter at the widest point. Sep 14, 2015 this feature is not available right now. Primary lesion a lesion directly associated with the disease process that is described with established dermatological terminology. If you were to close your eyes and run your finger over the skin, you generally would not be able to feel any change in texture. Define macule patch papule plaque nodule cyst vesicle bullae pustule lichenification erythema purpura categories. A circumscribed flat area, up to 1 cm in diameter, differing perceptibly in color from the.
That is, with your eyes closed, you cannot discern a boundary to the lesional area. Dermatology answers are found in the harriet lane handbook powered by unbound. Primary lesions macule patch papule plaque nodule tumor vesicle bulla pustule cyst secondary lesions scale crust excoriation lichenification maceration fissure erosion ulcer distinct lesions whealhive. Patch same as macule but exceeding 1 cm in diameter. Picture of skin diseases and problems cafe au lait macule.
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