Asbestos was mined and used commercially in North America beginning in the late 1800s. Its use increased greatly during World War II. Since then, it has been used in many industries. For example, the building and construction industry has used it for strengthening cement and plastics as well as for insulation, fireproofing, and sound absorption. The shipbuilding industry has used asbestos to insulate boilers, steampipes, and hot water pipes.
A simple blood test could detect early signs of deadly 'asbestos cancer', scientists have claimed. Patients with mesothelioma - often caused by exposure to asbestos - often die within a few years of diagnosis.
About three-fourths of mesothelioma occurrences start in the chest cavity and is known as pleural mesothelioma. Another 10% to 20% begin in the abdomen and is called peritoneal mesothelioma.
In a study published in The Lancet, researchers say checking levels of a key protein can identify over 80% of cases at an early stage.
Researchers from the Sir Charles Gairdner Hospital, Perth, Australia, developed a test to assess blood concentrations of soluble mesothelian related (SMR) protein, which has been shown to be an indicator of other cancers. The scientists believed high levels of SMR might also be seen in asbestos cancer patients.
The EPA suggested that consumers use vermiculite outdoors or in a well-ventilated area; keep vermiculite damp while using it; avoid bringing dust from vermiculite use into the home on clothing; and use premixed potting soil, which is less likely to generate dust.
Malignant mesothelioma is divided into three main types. About 50% to 70% of mesothelioma occurrences are the epithelioid type. This type has the best prognosis. The other two types are the sarcomatoid type (7%-20%), and the mixed/biphasic type (20%-35%). Treatment options for all three types are the same.
Victims who were exposed to asbestos at their workplace are entitled to compensation from government, while those who were exposed by other means can get money under common law.
Many colorectal cancers are thought to arise from adenomatous polyps in the colon. These mushroom-like growths are usually benign, but some may develop into cancer over time. The majority of the time, the diagnosis of localized colon cancer is through colonoscopy.
Therapy is usually through surgery, which in many cases is followed by chemotherapy.Colorectal cancer can take many years to develop and early detection of colorectal cancer greatly improves the chances of a cure.
Therefore, screening for the disease is recommended in individuals who are at increased risk. There are several different tests available for this purpose.Surgical treatment is by far the most likely to result in a cure of colon cancer if the tumor is localized.
Very early cancer that develops within a polyp can often be cured by removing the polyp at the time of colonoscopy. More advanced cancers typically require surgical removal of the section of colon containing the tumor leaving sufficient margins to reduce likelihood of re-growth.
If possible, the remaining parts of colon are anastomosed together to create a functioning colon. In cases when anastomosis is not possible, a stoma (artificial orifice) is created. While surgery is not usually offered if significant metastasis is present, surgical removal of isolated liver metastases is common. Improved chemotherapy has increased the number of patients who are offered surgical removal of isolated liver metastases.
Laparoscopic assist resection of the colon for tumour can reduce the size of painful incision and minimize the risk of infection.
As with any surgical procedure, colorectal surgery can in rare cases result in complications. These may include infection, abscess, fistula or bowel obstruction.
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