Lesions meaning

Skin lesions are abnormal changes of the skin compared to the surrounding tissue. Skin lesions may look like bumps or patches, or they may be smooth. They may be a different color or texture compared to nearby skin. There are many different types of skin lesions that you can be born with or acquire. Some are benign, which means they are harmless. Others can be severe and cancerous. They may appear all over your body, or they may be in one place. The shape can vary, too. Some lesions are symmetrical, meaning they are the same shape all the way around. Others are irregular in shape. The American Society for Dermatologic Surgery describes a skin lesion as an abnormal lump, bump, ulcer, sore, or colored area of the skin. The way a skin lesion looks and where it appears can help identify it. To find the cause of a skin lesion, healthcare providers consider: • Color • Size • Texture • Location This article looks at 20 different types of skin lesions, their causes, and their treatment. Primary vs. Secondary Skin Lesions Skin lesions are either primary or secondary. Primary skin lesions are either present from birth or develop during your lifetime. Secondary skin lesions arise from primary skin lesions. This can happen when a primary skin lesion is: • Disturbed • Irritated • Changes over time For example, if Primary Skin Lesions Primary skin lesions tend to be divided into three groups: • Lesions formed by fluid within the skin layers: Examples include vesicles and pustules. • Les...

Overview What are skin lesions? Skin lesions are areas of your What is the difference between a skin lesion and a skin sore? Skin sores refer to a type of skin lesion, like ulcers. Commonly, the terms sore and lesion are used to refer to the same type of abnormal skin. Is acne a skin lesion on my face? What are benign skin lesions? Skin lesions that are benign are noncancerous and often harmless. These lesions are abnormal growths on your skin. Most benign lesions don’t need treatment unless they’re bothering you or you don’t like how they look. Examples of benign skin lesions include: • • • • • • Acne. What is a malignant skin lesion? Skin lesions that are malignant are Signs of skin cancer include: • A wound that won’t heal. • New growth on skin. • Change in existing growth or mole. Who do skin lesions affect? Skin lesions affect everyone. Some lesions appear at birth (congenital) and pose no threat to your well-being (freckles, many types of moles). If you have allergies, you can get skin lesions if you come in contact with allergens that you’re sensitive to. If you have chronic conditions, like How do we classify skin lesions? One way of dividing skin lesions is primary versus secondary. Primary lesions are changes in your skin that aren’t associated with other conditions and include: • A flat mark on your skin of a different color than your skin tone (macule or patch). • An elevated, pimple-like bump (papule or plaque). • An elevated, solid bump (nodule). • A blister ...

Bone lesions are areas of bone that are changed or damaged. Causes of bone lesions include infections, fractures, or tumors. When cells within the bone start to divide uncontrollably, they are sometimes called bone tumors. Most bone lesions are benign, meaning they are not cancerous. Some bone lesions are cancerous, however, and these are known as malignant bone tumors. Share on Pinterest Bone lesions are a masses of tissue that can form in any part of the bone. Bone lesions can affect any part of the body and develop in any section of bone, from the surface to the They are caused by cells in the bone that start to divide and multiply uncontrollably, leading to a lump or mass of abnormal tissue. A growing lesion can destroy healthy tissue and weaken the bone, making it more vulnerable to Most bone lesions are benign, not life-threatening, and will not spread to other parts of the body. Some bone lesions, however, are malignant, which means they are cancerous. These bone lesions can sometimes metastasize, which is when the Malignant bone tumors are divided into two types: • Primary bone cancer, which is cancer that starts in the bone. • Secondary bone cancer, which is when cancer starts somewhere else and spreads to the bone. The cause of a bone lesion depends on whether it is benign or cancerous, in addition to other factors. Benign bone lesions Most bone lesions are benign, meaning they are not cancerous or life-threatening. There are also some diseases and conditions tha...

A skin lesion is a part of the skin that has an abnormal growth or appearance compared to the skin around it. Two categories of skin lesions exist: primary and secondary. Primary skin lesions are abnormal skin conditions present at birth or acquired over a person’s lifetime. Secondary skin lesions are the result of irritated or manipulated primary skin lesions. For example, if someone scratches a mole until it bleeds, the resulting lesion, a crust, is now a secondary skin lesion. Share on Pinterest ancoay/Getty Images • A cold sore is a red, painful, fluid-filled blister that appears near the mouth and lips. • The viruses herpes simplex 1 (HSV-1) and herpes simplex 2 (HSV-2) cause genital lesions as well as these types of oral lesions. • The affected area will often tingle or burn before the cold sore is visible. • These blisters occur alone or in clusters, weeping clear yellow fluid before they crust over. • Blisters may reoccur in response to stress, menstruation, illness, or sun exposure. Actinic keratosis Share on Pinterest CLS Digital Arts/Shutterstock • An actinic keratosis is a thick, scaly, or crusty skin patch that’s typically less than 2 centimeters (cm), or about the size of a pencil eraser. • It appears on parts of the body that receive a lot of sun exposure (the hands, arms, face, scalp, and neck). • It’s usually pink in color but can have a brown, tan, or gray base. Allergic eczema Share on Pinterest Photography by DermNet New Zealand • Contact dermatitis cau...

Liver lesions are abnormal growths of liver cells that can be cancerous or noncancerous. They’re found in as many as The majority of liver lesions are noncancerous, or benign. Many lesions are detected during imaging tests for unrelated health conditions. Although most lesions aren’t harmful, it’s still critical to receive a proper diagnosis. Keep reading to learn more about how liver lesions are classified, what causes them, and when treatment is needed. Liver lesions are any abnormal growths on your liver. They’re divided into two categories: Malignant lesions are cancerous. They require treatment to keep them from spreading. Benign lesions are noncancerous. Some benign tumors require treatment while others don’t. Malignant lesions Types of cancerous lesions include: Type of cancer Notes – – – develops in the body of your liver intrahepatic – develops in the bile ducts that connect your liver to your gallbladder – responsible for angiosarcoma and hemangiosarcoma – rare cancers of the cells that line your liver’s blood vessels hepatoblastoma – a very rare cancer that develops in children – “metastasis” means the cancer has spread from another organ where the cancer started; in this case, it spreads to the liver – Benign lesions Benign lesions are noncancerous growths. Small benign lesions often don’t cause symptoms and don’t require treatment. If tumors grow large, they may cause symptoms and need to be removed. The following lesions may require treatment: Benign lesions ...

Recent Examples on the Web Take note of any color changes, lesions, bumps, or tenderness. — Women's Health, 8 June 2023 The lesions will then stimulate other cells in the immune system, causing flares and more immune system reactions simultaneously.11 The reason for the rash's shape is unclear, but it might be related to the parts of the skin exposed to the sun. — Sara Coughlin, Health, 17 May 2023 Xylazine began appearing sporadically as an addictive substitute for heroin in the 2000s: In 2011, a study observed that people in farming areas of Puerto Rico were injecting horse anesthesia and developing serious lesions. — Jan Hoffman, New York Times, 20 Apr. 2023 The lesion removed from President Joe Biden's chest during his physical last month was cancerous, White House physician Dr. Kevin O'Connor said Friday. — Alexandra Hutzler, ABC News, 3 Mar. 2023 Testing confirmed the lesion was basal cell carcinoma, the most common form of skin cancer. — Caitlin Yilek, CBS News, 3 Mar. 2023 First Lady Jill Biden also had surgery to remove three skin lesions in January, and one of them was also a basal cell carcinoma. — Angus Chen And Rachel Cohrs, STAT, 3 Mar. 2023 First lady Jill Biden in January had two basal cell lesions removed from her right eye and chest. — Zeke Miller, Anchorage Daily News, 3 Mar. 2023 If left untreated, these lesions can progress into skin cancer.5 Screening can help detect cancers early and is important in people with lichen sclerosus. — Amanda Macmillan, H...

Types There is no designated classification or naming convention for lesions. Since lesions can occur anywhere in the body and the definition of a lesion is so broad, the varieties of lesions are virtually endless. Generally, lesions may be classified by their patterns, their sizes, their locations, or their causes. They can also be named after the person who discovered them. For example, Location Lesions are often classified by their tissue types or locations. For example, a "skin lesion" or a " Cause and behavior If a lesion is caused by a Size and shape Lesion size may be specified as gross, meaning it is visible to the unaided eye, or space-occupying lesion, as the name suggests, has a recognizable volume and may impinge on nearby structures, whereas a non space-occupying lesion is simply a hole in the tissue, e.g. a small area of the brain that has turned to fluid following a Lesions may also be classified by the shape they form. This is the case with many Research using lesions Brain lesions may help researchers understand brain function. Research involving lesions relies on two assumptions: that brain damage can affect different aspects of cognition independently, and that a locally damaged brain functions identically to a normal brain in its "undamaged" parts. Sham lesion is the name given to a control procedure during a lesion experiment. In a sham lesion, an animal may be placed in a stereotaxic apparatus and electrodes inserted as in the experimental condition, ...

Actinic Keratosis A precancerous skin lesion called actinic keratosis (AK) can be mistaken for a rash, age spots, or a wound, but it's actually a precancerous growth. Some AKs even have a horn-like appearance. AKs tend to develop on sun-damaged skin over a long period of time. On the lips, AKs may look like white patches or sores. • Basal cell carcinoma: May seem like a sore that won't heal, a smooth bump that dips in the center sometimes with small, visible blood vessels • Squamous cell carcinoma: A defined, thick, red scaly bump on the skin that may bleed or grow large if not removed • Melanoma: An aggressive form of skin cancer that can spread to other areas of the body if left untreated • A for asymmetry: Melanoma has an irregular shape where one half does not mirror the other. • B for border: The border around melanoma is not well defined. • C for color: Melanoma is multicolored with tan, black, brown, and sometimes other colors mixed in. • D for diameter: Melanomas can grow quickly and typically are diagnosed once they reach the size of a pencil eraser or larger. • E for evolving: Melanoma can seem like a mole that grows and changes rapidly, especially when compared to your other moles and freckles. It's not always easy to discern the difference between a problematic lesion and one that's merely cosmetic, especially for the untrained eye. Visiting the dermatologist as recommended (yearly, or every six months for those with history) is a proactive way to get ahead of ...