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It can be polygonal but is never rectangular or square. [6] It can appear with a stalk, be thread-like or look warty. [3] Ulceration, oozing, bleeding or thin blood vessels may be present in a papule. [6] It can be soft or firm and its surface may be rough or smooth. [2] Some have crusts or scales. [2]
Skin tags are thought to occur from skin rubbing against skin, since they are often found in skin creases and folds. [2] Studies have shown existence of low-risk human papillomaviruses 6 and 11 in skin tags, hinting at a possible role in their pathogenesis , [ 3 ] although a 2012 study found no association between skin tags and either low- or ...
Fissure is a lesion in the skin that is usually narrow but deep. [29] [33] Induration is dermal thickening causing the cutaneous surface to feel thicker and firmer. [29] Atrophy refers to a loss of skin, and can be epidermal, dermal, or subcutaneous. [30] With epidermal atrophy, the skin appears thin, translucent, and wrinkled. [29]
Lesions are often classified by their tissue types or locations. For example, a "skin lesion" or a "brain lesion" are named for the tissue where they are found.If there is an added significance to regions within the tissue—such as in neural injuries where different locations correspond to different neurological deficits—they are further classified by location.
A vesiculobullous disease is a type of mucocutaneous disease characterized by vesicles and bullae (i.e. blisters).Both vesicles and bullae are fluid-filled lesions, and they are distinguished by size (vesicles being less than 5–10 mm and bulla being larger than 5–10 mm, depending upon which definition is used).
The tumours (also called lesions) appear in various colours, from light tan to black. They are round or oval, feel flat or slightly elevated, like the scab from a healing wound, and range in size from very small to more than 2.5 centimetres (1 in) across. [5] They are often associated with other skin conditions, including basal cell carcinoma. [6]
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Dermatitis is a term used for different types of skin inflammation, typically characterized by itchiness, redness and a rash. [1] In cases of short duration, there may be small blisters, while in long-term cases the skin may become thickened. [1] The area of skin involved can vary from small to covering the entire body.