Mesothelioma, A Rare Lung Cancer

Mesothelioma is a cancer of the mesothelium-thefrom rock found in many countries. It is made up
sac lining the internal body cavities. The liningof tiny fibres that are as strong as steel but can
around the lungs is called the pleural and in thebe woven like cotton and are highly resistant to
abdomen it is known as the peritoneum.Althoughheat and chemicals.
sometimes referred to as "asbestos lung cancer",During the 1960s the first definite link between
mesothelioma is not the same as lung cancer.mesothelioma and asbestos was made. In the
Lung cancers occur inside the lung itself;past asbestos was imported to the UK in large
mesothelioma occurs in the lining of the lung.quantities. It was used in construction, ship-building
Mesothelioma is rare, striking fewer than 3000and in household appliances. Asbestos was very
Americans per year.About 2000 people in the UKwidely used in insulation materials, such as amosite
are diagnosed with mesothelioma each year.insulation board, and building materials, including
There are three recognized types ofasbestos cement.
mesothelioma.When asbestos is disturbed or damaged, it
1.Pleural mesotheliomareleases tiny fibres that can be breathed into the
2.Peritonial mesotheliomalungs. Asbestos fibres are very fine and, when
3.Pericardial mesotheliomabreathed in, they can make their way into the
Pleural mesothelioma is the most common formsmallest airways of the lung, so they cannot be
of the disease, accounting for roughly 70% ofbreathed or coughed out. Once the fibres are in
cases, and occurs in the lining of the lung knownthe lungs, the body's defense mechanism tries to
as the pleura. Peritoneal mesothelioma occurs inbreak them down and remove them, which leads
the lining of the abdominal cavity, known as theto inflammation in the lung tissue.
peritoneum and pericardial mesothelioma originatesThe asbestos fibres can also penetrate through
in the pericardium, which lines the heart.the lung tissue to settle in the pleura (the
Asbestos is the most common cause ofmembrane around the lung). Over many years
mesothelioma. Up to nine out of ten cases ofthey can cause mesothelioma or other lung
mesothelioma are caused by exposure todiseases to develop.
asbestos. Asbestos is a natural mineral, mined