Posting Komentar. What is mesothelioma? Mesothelioma is a form of cancer that occurs at the thin lining that covers the internal layer of several organs and body cavities, this layer is called the mesothelium. Thus mesothelioma is a conjunction of two words, mesothelium, and oma, which is usually used to describe the end process of dysplasia the abnormal development or growth of a tissue or organ. Most common symptoms of malignant pleural mesothelioma are shortness of breath dyspnea , due to fluid gathering around the lungs pleural effusion and non pleuritic chest wall pain. Other symptoms may include fever, sweats, weight loss, getting easily fatigued, unexplainable weight loss, chest discomfort, and pleuritic pain.
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Posting Komentar. What is mesothelioma? Mesothelioma is a form of cancer that occurs at the thin lining that covers the internal layer of several organs and body cavities, this layer is called the mesothelium. Thus mesothelioma is a conjunction of two words, mesothelium, and oma, which is usually used to describe the end process of dysplasia the abnormal development or growth of a tissue or organ. Most common symptoms of malignant pleural mesothelioma are shortness of breath dyspnea , due to fluid gathering around the lungs pleural effusion and non pleuritic chest wall pain.
Other symptoms may include fever, sweats, weight loss, getting easily fatigued, unexplainable weight loss, chest discomfort, and pleuritic pain. Asymptomatic patients is usually identified upon percussion and auscultation during a physical examination performed by a physician or findings obtained through a chest radiograph.
This is because mesothelioma often takes decades to develop, and men are more likely to work in jobs where asbestos exposure occurs. Other causes may include genetic disposition, irradiation of the chest and abdomen, exposure to erionite a fibrous silicate zeolite having similar traits as asbestos , and the usage of intrapleural thorium dioxide thorotrast as a contrast medium. What is asbestosis? Asbestosis is a scarring fibrosis and chronic inflammatory disease which affects the tissue of the lungs that is caused by exposure, inhalation and retention of asbestos fibers.
Asbestosis symptoms can range from mild to severe, and usually don't appear until many years after continued exposure. This condition may also be known as pneumoconiosis, or to be more precise, pneumoconiosis caused by asbestos inhalation. Asbestos refers to a group of naturally occurring hydrated mineral silicate fibers including two major forms: serpentine, represented by chrysotile white asbestos and amphibole, which includes crocidolite blue asbestos , amosite brown asbestos , anthophyllite, actinolite and tremolite.
Asbestos is a whitish material that was used in buildings for insulation, flooring and roofing in the past, but is now no longer used. While asbestos can be dangerous, it doesn't present a health risk if left undisturbed. But if material containing asbestos is damaged, it can release a fine dust that contains asbestos fibres.
People with extensive occupational exposure to the mining, manufacturing, handling, or removal of asbestos are at risk of developing asbestosis, therefor it is considered an occupational lung disease. When the dust is breathed in, the asbestos fibres enter the lungs and can gradually damage them over time.
But you would need prolonged exposure to asbestos fibres, usually over many years, before you develop asbestosis. The signs and symptoms of asbestosis typically manifest after a significant amount of time has passed following asbestos exposure, often several decades.
The primary symptom of asbestosis is generally the slow onset of shortness of breath, especially with physical activity. Clinically advanced cases of asbestosis may lead to respiratory failure. Other symptoms may include coughing, chest pain, blood in the sputum, difficulty in swallowing, loss of appetite and weight loss.
When a physician listens with a stethoscope to the lungs of a person with asbestosis, they may hear inspiratory crackles. A considerable note is that asbestosis specifically refers to fibrosis within the lung tissue from asbestos, and not scarring around the outside of the lungs. So in short, mesothelioma is an end result cancer that is mostly caused by asbestosis exposure to asbestos.
What is the difference between asbestos cancer and mesothelioma? Lung cancer can be directly caused by asbestos exposure, and some studies have suggested a link between exposure and other types of cancer. Elevated risks for a number of other cancers continue to be investigated.
According to the World Health Organization, approximately half of all deaths from occupational cancer are caused by asbestos. In a large study of 1, asbestos industry employees, a malignant tumor was listed as the official cause of death for workers.
Respiratory cancers primarily in the bronchus, trachea or lung made up the majority of the cancer deaths, followed by cancers of the digestive organs and peritoneum, the lining of the abdomen. Aside from mesothelioma and lung cancer, asbestos has been associated with a number of other cancers.
Research is still determining the extent to which asbestos can cause other types. Further explanation concerning this matter will be later discussed below at the suitable sub-topic. Asbestos exposure. Asbestos, particularly the types of amphibole asbestos known as crocidolite and amosite asbestos, is the main carcinogen implicated in the pathogenesis of malignant pleural mesothelioma.
Exposure to chrysotile asbestos is also known to be associated with malignant mesothelioma, but at a lower incidence than occurs with the other types. The rod-shaped amphiboles are more carcinogenic than the chrysotile.
Further discussed below in types and categories. Approximately 8 million people in the United States have been exposed to asbestos in the workplace. A substantial proportion of patients with malignant pleural mesothelioma were exposed to asbestos in asbestos mills, mines, shipping yards, or their homes. The crocidolite in asbestos is associated with mesothelioma in miners, manufacturers who use asbestos, and heating and construction workers.
The greater the exposure the greater the risk. As of about million people have been exposed to asbestos at work worldwide. High rates of disease occur in people who mine asbestos, produce products from asbestos, work with asbestos products, live with asbestos workers, or work in buildings containing asbestos. Asbestos exposure and the onset of cancer are generally separated by about 40 years.
Washing the clothing of someone who worked with asbestos could also increases the risk. In about 60, people had mesothelioma and 32, died from the disease. Rates of mesothelioma vary in different areas of the world. Rates are higher in Australia, the United Kingdom, and lower in Japan. It occurs in about 3, people per year in the United States.
It occurs more often in males than females. Rates of disease have increased since the s. Diagnosis typically occurs after the age of 65 and most deaths occur around 70 years old. The disease was rare before the commercial use of asbestos. Some of the industries associated with asbestos exposure include :. Mining Ceramics Paper milling Auto parts asbestos brake lining Ship building involving the use of asbestos Asbestos cement manufacture Railroad repair Insulation.
In Turkey, the use of the fibrous substance erionite similar to amphibole asbestos in building construction has led to an epidemic of pulmonary mesothelioma. Environmental exposure to asbestos in areas polluted by the substance may also increase the incidence of mesothelioma. Alcohol, dietary factors, and tobacco smoke have not been found to have any effect on the incidence of pleural mesothelioma. Types of asbestos fibers.
The word asbestos derives from the Greek language and means inextinguishable. The curved fibers make up serpentine asbestos chrysotile is the prime example , and the straight fibers make up amphibole asbestos. Six mineral types are defined by the United States Environmental Protection Agency EPA as "asbestos" including those belonging to the serpentine class and those belonging to the amphibole class. All six asbestos mineral types are known to be human carcinogens. The visible fibers are themselves each composed of millions of microscopic "fibrils" that can be released by abrasion and other processes.
Serpentine Class Asbestos. Serpentine class fibers are curly. Chrysotile is the only member of the serpentine class. Chrysotile is the only type of asbestos that is from the serpentine family and is known as white asbestos.
These fibers are curly and are comprised of sheets of crystals. Throughout industrial history, more than 95 percent of all asbestos used around the world was of the chrysotile variety. Despite the numerous studies that have proven chrysotile carcinogenic traits, this exception is the result of a long lobbying history by those in the asbestos industry. Chrysotile, is obtained from serpentinite rocks which are common throughout the world.
Chrysotile appears under the microscope as a white fiber. Chrysotile has been used more than any other type and accounts for about 95 percent of the asbestos found in buildings in America. Chrysotile is one of the most common and most dangerous forms of asbestos found within our Earth. This type of asbestos accounts for approximately 90 percent of commercially-used asbestos in the world. Chrysotile asbestos fibers are long, white, and curly. Chrysotile is more flexible than amphibole types of asbestos, and can be spun and woven into fabric.
The most common use was corrugated asbestos cement roofing primarily for outbuildings, warehouses and garages. It may also be found in sheets or panels used for ceilings and sometimes for walls and floors. Chrysotile has been a component in joint compound and some plasters. Numerous other items have been made containing chrysotile including brake linings, fire barriers in fuseboxes, pipe insulation, floor tiles, residential shingles, and gaskets for high temperature equipment.
Many studies have proven that exposure to chrysotile asbestos, commonly referred to as white asbestos, can cause a number of serious health conditions. While most commercial uses of asbestos in the United States have been of the chrysotile type, the use of this toxic mineral has declined significantly during the last few decades. Naturally occurring deposits of chrysotile are often accompanied by trace amounts of tremolite amphibole asbestos, which is considered more toxic than chrysotile.
However, several reports have indicated that exposure to solely chrysotile asbestos fibers can occur and such exposure can be equally hazardous as exposure to amphibole asbestos types.
Scientists from the National Institute for Occupational Safety and Health concluded that chrysotile asbestos should be treated with virtually the same level of concern as the amphibole forms of asbestos. Uses of Chrysotile Asbestos.
In comparison to amphiboles, chrysotile fibers are generally finer with high flexibility and good heat resistance. Known as the most common asbestos mineral, chrysotile accounts for about 90 to 95 percent of asbestos used in commercial applications in the United States.
This toxic mineral has been utilized in a number of products, including:. Amphibole Class Asbestos. Amphibole class fibers are needle-like. The other five types of asbestos are classified in the amphibole class. Amosite brown asbestos and crocidolite blue asbestos are considered the most commercially valuable types.
Pleural Plaques and Asbestos
The definition of asbestosis in the dictionary is inflammation of the lungs resulting from chronic inhalation of asbestos particles. Definisi asbestosis ing kamus iku inflammation saka paru amarga saka inhalasi kronis saka partikel asbes. Dasanama lan kosok bali saka asbestosis ing bausastra dasanama Basa Inggris. The chest radiograph is abnormal in most, but not all, cases of pathologically demonstrated asbestosis.
Pleurisi , juga dikenali sebagai pleuritis , ialah keradangan membran yang mengelilingi paru-paru dan garis rongga dada pleurae. Ini boleh menyebabkan sakit dada yang tajam dengan pernafasan. Gejala lain mungkin termasuk sesak nafas , batuk , demam atau penurunan berat badan, bergantung kepada sebab yang mendasari. Penyebab yang paling biasa adalah jangkitan virus. Keadaan lain yang boleh menghasilkan simptom yang sama termasuklah perikarditis , serangan jantung , kolesistitis , dan pneumotoraks.