Like with any other illness or serious, terminal disease, the medical tests and confirmation of the existing condition, progression and prognosis, is actually the start of the process of identifying, addressing and effectively dealing with mesothelioma.
A full and detailed review of the patient’s medical history will be taken to enable and effect, underscore and make an accurate diagnosis possible.
Any occupational exposure to asbestos is placed under closer scrutiny. Any work I mines, with some of the products containing asbestos (insulation, cement, HVAC etc, as well as some other professions like construction, engineering and the like), will be considered. These factors will all contribute to a heightened ‘clinical’ hypothesizing about possible origin, root cause of the symptoms.
Diagnostic testing will back up and follow any level of suspicion for mesothelioma.
A full and comprehensive, physical medical examination will follow. Chest X-rays and lung-capacity testing is the logical next avenue of choice. Thickening and presence of fluid will be detected and clearly visible. These will all contribute to more than mere suspicion now for the dreaded mesothelioma.
Next steps will be MRI, CT or CAT scan as they are commonly referred to in the medical community.
Cytology might be performed where lots of the excessive fluids are ‘aspirated’ with a syringe, pleural taps or chest drain, paracentesis or ascitic drain or pericardiocentesis. The method will depend on the location and amount of fluid present – the feasibility of the test procedure. Even if the diagnosis is negative at this point, the data obtained can also be used to rule out other illnesses like TB or heart conditions.
Biopsies are next in line to confirm the diagnosis. A tissue sample through thoracoscopy for example. Looking inside and taking a sample are the goals of this process and outcome.
A Laparoscopy will be done if the lower abdomen or trunk cavity is in question.
Sometimes going deeper would require exploratory diagnostic surgery to determine the nature and extent of the disease, also disease and diagnosis confirmation will be given upon a positive diagnosis
Sunday, March 28, 2010
Mesothelioma Tests And Diagnosis Information
There are several tests that doctors can run to determine if a patient has a mesothelioma diagnosis. These mesothelioma tests vary in terms of intrusion into the body and accuracy. A time line for testing a person suspected of having mesothelioma is as follows:
When a patient first presents at the doctors office complaining of difficulty breathing, abdominal pain, or pneumonia types symptoms, the primary care physician will take an X-ray or CT scan to determine the presence of asbestos in or around the lungs, heart or stomach.
Once the detection of asbestos is noted, the doctor will look for tell tale signs of cancer including but not limited to the presence of tumors around the vital organs. If tumors or growths are detected, the primary care physician will typically refer the patient to a specialist for various tests to determine whether there is a mesothelioma diagnosis.
A mesothelioma diagnosis is generally tested for in one of two ways. Depending on the condition of the patient, the doctor may want to do a minimally intrusive procedure called a needle biopsy. The procedure allows the doctor to abstract cells suspected of cancer infection from the lining affected area. The doctor can run tests on the mesothelial cells to determine the proper diagnosis for the patient. There are several ways in which the doctor can perform a tissue biopsy in order to run tests for mesothelioma. A thoracoscopy or laparoscopy entails making a small incision and using a tiny camera to look at the affected area. At this time a small tissue sample can be taken. The tissue samples will be sent away to a pathologists for further tests. Your doctor may decide to do a needle biopsy, where a hollow needle is inserted through the skin and into the chest cavity. However, needle biopsies can be less than precise.
The second more common way that doctors test for mesothelioma is to surgically enter the patients body, at which time they cut a small piece of infected tissue for biopsy purposes. This test is known as an "open biopsy". The abstracted tissue is then sent out for testing by a specialist. This process generally takes several days. If this test reveals the presence of mesothelioma the doctor will determine whether the diagnosed mesothelioma is benign or malignant.
If the doctor determines that the mesothelioma diagnosis is malignant, they will likely refer the patient to an oncologist (cancer doctor) for further tests and treatment.
The oncologist will test the patient to determine the progression of the mesothelioma and the prognosis for the future. At this time the oncologist will decide what treatment option is best for the patient.
Generally, the oncologist will start the patient on a series of chemotherapy treatments to slow the growth of the mesothelioma. If the doctor determines, after running tests, that the patient is not a candidate for chemotherapy, the oncologists may prescribe medication to help the patient with pain management.
Data, Statistics & Information.
Mesothelioma is fairly rare. There are an estimated 2,000 to 3,000 new cases of mesothelioma diagnosed each year in the United States. The incidence of mesotheliomas in the United States increased from 1970 to 1990 and then stabilized. It may now be decreasing. Most of the past increase in cases, as well as the recent decrease in cases, has been in men. The rate of incidence in women although lower, has been fairly steady. In European countries and world wide, the rate of mesotheliomas is still increasing.
Mesothelioma, asbestos & more about this disease.
Mesothelioma is a serious disease. The only known cause of mesothelioma is asbestos. By the time the symptoms appear and cancer is diagnosed, the disease is often in advanced stages. The average survival time is about 1 year. The 5-year relative survival rate is around 10%, but this rate has been slowly improving. Better treatments have resulted in a more favorable outlook for recently diagnosed patients.Mesothelioma Treatments
With new clinical trials being introduced on a regular basis, there are a variety of treatments being used on mesothelioma. The treatment used is dependant upon a variety of factors, including the extent of the disease, the age and medical history of the patient, and the location and type of the mesothelioma.
The most common treatments are:
Surgery, where the tissue in the affected area is cut out. This may involve removing part of the organ depending on the size of the affected area.
Radiation treatment, which involves the use of radiation treatment to kill off the cancerous cells in the affected area.
Chemotherapy, which is the use of drugs in the body used to kill off the cancerous cells.
Pneumonectomy
A surgical procedure, known as pneumonectomy, can be used for pleural mesothelioma and involves the removal of the diseased lung. An extra-pleural pneumonectomy may be necessary depending upon the spread of the disease, and this may involve the removal of parts of the diaphragm as well as the lung. There is a high risk factor with this surgery, and its viability is dependant upon the patient’s overall health, smoking habits and the extent of the asbestos exposure. A pleurectomy is another type of surgery that may be used, and here part of the chest, abdominal lining and surrounding tissue may be removed.
Radiation treatment
Radiation treatment , which gives the benefit of treating the affected area without exposing the healthy cells and tissue, is another treatment used to treat mesothelioma. This is a speedy and commonly used method for many types of cancer, as well as mesothelioma. It works through the placements of radioactive sources in the affected area, which then give out radiation to kill off the abnormal cells. The radiation continues to transmit for around a year, working to destroy the tumour. Radiation therapy can be used alongside surgery, or if the patient is not well enough for surgery can be used alone.
Chemotherapy treatments
Chemotherapy treatments can be administered in the form of pills or injected medication. The downside of chemotherapy is that the drugs used can contain high toxicity levels and can therefore make patients quite ill. Side effects can include nausea, vomiting, hair loss, weight loss and physical fatigue. There are also a number of post-chemo drugs that are used to alleviate the side effects of the chemotherapy. Because chemotherapy drugs are not targeted towards a specific area, they are left to make their way through the body and find the affected area. This means that they are also able to affect tissue and cells that are unaffected by the disease, which can again cause side effects.
Palliative Therapies
Palliative Therapies may also be used on mesothelioma patients. These therapies entail draining excess fluid from the patient through the use of a needle and suction. To prevent further fluid accumulation drugs may be fed through a tube into the chest following the fluid drainage.
Often, a combination of treatments and a cocktail of drugs have to be used in order to treat mesothelioma patients. Again, the types of treatment used will be dependant upon the age and physical health of the patient as well as upon how far the disease has spread and where it is located.
The above are some of the most common treatments used for the treatment of mesothelioma, but they do not always work effectively on mesothelioma patients. Because of this, sufferers of mesothelioma may be offered treatment as part of a clinical trial as opposed to any of the traditional treatments.
With new mesothelioma cancer treatments are continually being tested through medical research studies, it is hoped that an effective treatment will soon be discovered. These clinical trials enable professionals to asses whether the treatment being tested may one day be effective for general use to treat mesothelioma. And these clinical trials also give hope to the patients who allow themselves to be used as guinea pigs, enabling them to be a part of this important research and find a drug that may help them and others in the same situation.
Mesothelioma Research
Mesothelioma is a disease that is still very hard to recognise, difficult to diagnose and virtually impossible to treat effectively. It is known that the disease is asbestos related and that there is a long latency period before symptoms become apparent. But with more and more cases coming to light each year, it is vital that further research is carried out in order to make this fatal disease more manageable for both patients and doctors.
Many organizations are involved in research in to mesothelioma. This includes the companies that are responsible for the use of asbestos. Many people that have been diagnosed with mesothelioma have now discovered that they can claim compensation for being exposed to hazardous asbestos by companies, which means that these companies have a responsibility to help with this research.
The National Institute of Cancer is also working hard to research mesothelioma, its symptoms, diagnosis and treatment. The rising number of mesothelioma cases means that it is essential to learn more about this disease in order to look into developing treatments.
With many mesothelioma patients now seeking legal advice, it has become essential for law firms to learn about and research the disease. It is the lawyer’s job to assist the mesothelioma patient and provide advice and resources from which the patient can get help and assistance. Therefore, law firms dealing with these types of cases also have a responsibility to learn about the disease and what can be done to help patients.
A great deal of research into mesothelioma goes into learning about the effects of asbestos upon cells, and how the cells are changed by exposure to this material. By learning how healthy cells and corrupted by asbestos, we hope to learn more about how this cell corruption can be prevented or minimised.
The National Institute of Cancer has also carried out clinical trials into the treatment of mesothelioma. The trials, which are performed with real patients who have been diagnosed with mesothelioma, should help to determine how effective the various treatments are, and hopefully will go some way to helping experts find more effective treatments for the disease.
Mesothelioma trials are based upon treatments that are thought to have some value to patients. But the trials are just that – trials. This means that there are no guarantees and that a great deal more work and research will be required before a conclusive and effective treatment is found. On the upside, many new trials are being carried out on a regular basis, and with the information and technology available to scientists today, the discovery of an effective treatment for mesothelioma patients is just a matter of time.
Medical professionals worldwide are currently involved in clinical trials, and each trial depends upon the extent of spread of the disease. Some trials are performed on those who have been diagnosed reasonably early, others on patients who were not diagnosed until the latter stages of the disease. It is important for scientists to find a treatment that is effective not only on those who are diagnosed early, but on all patients that suffer from this killer disease.
The research carried out into mesothelioma will hopefully mean that future generations of suffers can be saved, even if they are diagnosed with the disease. The research carried out is extremely costly, and is often sponsored by associated companies such as drug companies and research groups as well as by the government. Research into the contraction of the disease, and its subsequent development will ultimately enable professionals to devise the most effective treatment.
Several new methods of treatment have been used following research into mesothelioma. These include:
Photodynamic therapy, which uses fixed frequency light to target abnormal cells and kill them off by the activation of photosensitizing drugs.
Immunotherapy, which fights the abnormal cells through the use of the body’s own defence system through enhancement and development of the immune system.
Intensity Modulated Radiation Therapy, which is a radiation treatment that targets just the affected area/tumour, thus avoiding contact with healthy cells and tissue.
Although there is no quick-fix answer to the treatment of mesothelioma, ongoing research and dedication from the medical profession means that the chances of finding an effective treatment are continually increasing.
Symptoms Of Mesothelioma
The long latency period attached to mesothelioma means that the symptoms of this disease can take many years to manifest, making both diagnosis and effective treatment very difficult. And even when the symptoms do become evident, which can take several decades, the symptoms are so generalised and non-specific that they could be put down to any number of more common diseases. This makes it hard for even experienced doctors to make a quick and conclusive diagnosis with mesothelioma patients. The symptoms of this disease can often be confused with pneumonia during its early stages.
Some of the most common symptoms of pleural mesothelioma (which is the most common form of the disease) are shortness of breath and chest pains. This may be accompanied by a persistent cough, and all of these symptoms stem from the build up of fluid between the lining of the lung and the chest cavity. This is known as pleural effusion. This type of the disease starts in the chest cavity and can then spread to other parts of the body. Pleural mesothelioma sufferers may also begin to display severe breathing difficulty, weight loss and fever as well as trouble swallowing and even swelling of the face and neck. Some patients may also develop a rasping voice and start coughing up blood. However, there are other patients that may not show any significant symptoms at all.
The symptoms for patients who suffer from peritoneal mesothelioma (a rarer form of the disease) are slightly different. This type of the disease starts in the abdomen and can spread form there. Patients of peritoneal mesothelioma can display abdominal pain and swelling, nausea, loss of appetite and vomiting. They can also suffer breathing problems, and chest pain in addition to these symptoms. These symptoms result from tumours that lean against the abdominal wall. Bowel obstruction, anaemia, fever and problems with blood clotting may also affect peritoneal mesothelioma patients.
The rarest form of this disease is pericardial mesothelioma, which starts in the cavity surrounding the heart. With pericardial mesothelioma, the tumours grow in the tissues that surround the heart and can spread from there. Pericardial mesothelioma sufferers may experience chest pain, shortness of breath, persistent coughing and palpitations.
As the disease moves into the later stages, the symptoms for all types of mesothelioma become more acute and obvious, although they can still often be put down to another illness. It is therefore important for patients to inform their doctor if they have been exposed to asbestos at any point – or even if they suspect they may have been exposed to asbestos. This will enable the doctor to make a more informed diagnosis rather than basing his diagnosis on guess work. It is also important not to ignore any of these symptoms, especially if they are experienced over a long period. Many people can be exposed to asbestos inadvertently (e.g. through the clothes of someone that has worked with asbestos) so it is important to visit your doctor should any of these symptoms manifest.
With pleural mesothelioma being the most common form of the disease, the symptom associated with this form of the cancer are the most common ones that are displayed by patients. However, it is important to be fully aware of the symptoms for all three types of mesothelioma, particularly for those who have worked in high risk professions where they may have been exposed to asbestos.
Most people who have worked with asbestos in the past do not begin to show symptoms of mesothelioma until thirty to forty years later. By this time, the disease is already spreading and with the delay in diagnosis, makes it impossible to treat in many cases before it is too late. However, the cause, effects and symptoms of mesothelioma are now becoming more widely known by professionals and lay people. This awareness, coupled with the current clinical trials that are being carried out by a variety of organizations gives patients the hope that an effective treatment will one day be available for all stages of the disease.
Mesothelioma
Also called: Malignant mesothelioma
The tissue that lines your lungs, stomach, heart and other organs is called mesothelium. Mesothelioma is cancer of that tissue. It is a rare but serious type of cancer. It usually starts in the lungs, but can also start in the abdomen or other organs. Most people who develop mesothelioma have worked on jobs where they inhaled particles. It can take a long time - 30 to 50 years - between being around asbestos and getting the disease. Treatment includes surgery, radiation, chemotherapy or all three
How do you get malignant mesothelioma?
What is Mesothelioma? What is the difference between pleural mesothelioma and peritoneal mesothelioma?
Malignant mesothelioma is a disease in which a cancerous tumor grows on the mesothelium - the sac lining the internal body cavities. The specific type of mesothelioma is named for the tissue where the cancer started. Pleural mesothelioma starts in the chest, in the pleura that surrounds the lungs (outer lining of the lungs and internal chest wall). It makes up about 70% of mesothelioma cases. Peritoneal mesothelioma starts in the lining of the abdominal cavity.
Although sometimes referred to as "asbestos lung cancer", mesothelioma is not the same as lung cancer. Lung cancers occur inside the lung itself; mesothelioma occurs in the lining of the lung. Mesothelioma is rare, striking fewer than 3000 Americans per year.
How do you get malignant mesothelioma?
Mesothelioma is caused by asbestos exposure. Asbestos, once regarded as a miracle mineral, was popular due its lightweight but tough characteristics as well as for its heat-resistant properties. This naturally occurring mineral was used in many commercial and consumer products, from construction materials such as cement, roofing shingles and insulation, to consumer and industrial applications such as hair dryers, automobile brake pads and pipe insulation.
Anatomy of the Lung Mesothelioma and how it effects the lung
Most people with malignant mesothelioma worked on jobs where they breathed asbestos. Others were exposed to asbestos in a household environment, often without knowing it.
How much exposure does it take to get the disease? What is the latency period?
Very little exposure can result in mesothelioma. Sometimes people who worked with asbestos for as little as one or two months get mesothelioma. The "latency period" refers to the time between asbestos exposure and diagnosis of the disease. For mesothelioma, the latency period can be decades long, and people exposed in the 1940s, 50s, 60s, and 70s are now being diagnosed.
What are the symptoms of mesothelioma?
Our mesothelioma symptoms page goes into detail about the signs of this cancer. Please note that it is important to seek professional medical advice when trying to diagnose for mesothelioma. The major symptoms include:
* Shortness of breath caused by expanding pleural effusion
* Persistent dry cough
Other symptoms may include:
* Fatigue
* Night sweats
* Fever
* Pain under the rib cage
* Swelling or lumps in the abdomen
* Unexpected weight loss
How do doctors treat malignant mesothelioma?
Each patient has an individualized treatment plan which takes into account the type and stage of the cancer as well as the patient's overall health. Traditional mesothelioma treatments include surgery, chemotherapy, radiation or a combination of these. Contact us at 1-877-367-6376 if you want to talk about reviewing treatment options.
Is there any promising research or are there promising new drugs for mesothelioma?
Scientists and doctors are engaged in research at various cancer centers all over the United States. Researchers are constantly trying to develop new and more effective drugs as well as new treatment techniques. In the past few years, there have been several major advances in the management of mesothelioma, including more accurate staging, improvements in surgical techniques and postoperative care, new chemotherapy regimens, and new radiotherapy techniques such as intensity-modulated radiation therapy. Some of this research is being conducted through clinical trials, for which you may be eligible. Please call us if you need additional information on current trials.
What should I do if I think I've been exposed to asbestos but don't have mesothelioma?
You probably will not get this rare disease, but you should remain vigilant and get regular check-ups. Let your doctor know about your asbestos exposure.
I was exposed to asbestos when I was in the military. Could that be how I got mesothelioma?
The armed forces used asbestos extensively in the 20th Century, and because of the long latency period only now are many veterans getting mesothelioma. People were exposed in all branches of the service, in a variety of jobs. We have worked with veterans from all over the country. We can help you find VA resources and medical assistance. Our veterans section goes into more detail or feel free to call us at 1-877-367-6376.
Where can I find information on living with mesothelioma?
Mesothelioma Aid is a good website for resource for families dealing with mesothelioma. It includes advice and referrals to other resources for coping with cancer, caregiving, financial challenges, and support groups. Alternatively, contact us here at Mesothelioma Web for help finding resources for living with this disease.
Malignant mesothelioma is a disease in which a cancerous tumor grows on the mesothelium - the sac lining the internal body cavities. The specific type of mesothelioma is named for the tissue where the cancer started. Pleural mesothelioma starts in the chest, in the pleura that surrounds the lungs (outer lining of the lungs and internal chest wall). It makes up about 70% of mesothelioma cases. Peritoneal mesothelioma starts in the lining of the abdominal cavity.
Although sometimes referred to as "asbestos lung cancer", mesothelioma is not the same as lung cancer. Lung cancers occur inside the lung itself; mesothelioma occurs in the lining of the lung. Mesothelioma is rare, striking fewer than 3000 Americans per year.
How do you get malignant mesothelioma?
Mesothelioma is caused by asbestos exposure. Asbestos, once regarded as a miracle mineral, was popular due its lightweight but tough characteristics as well as for its heat-resistant properties. This naturally occurring mineral was used in many commercial and consumer products, from construction materials such as cement, roofing shingles and insulation, to consumer and industrial applications such as hair dryers, automobile brake pads and pipe insulation.
Anatomy of the Lung Mesothelioma and how it effects the lung
Most people with malignant mesothelioma worked on jobs where they breathed asbestos. Others were exposed to asbestos in a household environment, often without knowing it.
How much exposure does it take to get the disease? What is the latency period?
Very little exposure can result in mesothelioma. Sometimes people who worked with asbestos for as little as one or two months get mesothelioma. The "latency period" refers to the time between asbestos exposure and diagnosis of the disease. For mesothelioma, the latency period can be decades long, and people exposed in the 1940s, 50s, 60s, and 70s are now being diagnosed.
What are the symptoms of mesothelioma?
Our mesothelioma symptoms page goes into detail about the signs of this cancer. Please note that it is important to seek professional medical advice when trying to diagnose for mesothelioma. The major symptoms include:
* Shortness of breath caused by expanding pleural effusion
* Persistent dry cough
Other symptoms may include:
* Fatigue
* Night sweats
* Fever
* Pain under the rib cage
* Swelling or lumps in the abdomen
* Unexpected weight loss
How do doctors treat malignant mesothelioma?
Each patient has an individualized treatment plan which takes into account the type and stage of the cancer as well as the patient's overall health. Traditional mesothelioma treatments include surgery, chemotherapy, radiation or a combination of these. Contact us at 1-877-367-6376 if you want to talk about reviewing treatment options.
Is there any promising research or are there promising new drugs for mesothelioma?
Scientists and doctors are engaged in research at various cancer centers all over the United States. Researchers are constantly trying to develop new and more effective drugs as well as new treatment techniques. In the past few years, there have been several major advances in the management of mesothelioma, including more accurate staging, improvements in surgical techniques and postoperative care, new chemotherapy regimens, and new radiotherapy techniques such as intensity-modulated radiation therapy. Some of this research is being conducted through clinical trials, for which you may be eligible. Please call us if you need additional information on current trials.
What should I do if I think I've been exposed to asbestos but don't have mesothelioma?
You probably will not get this rare disease, but you should remain vigilant and get regular check-ups. Let your doctor know about your asbestos exposure.
I was exposed to asbestos when I was in the military. Could that be how I got mesothelioma?
The armed forces used asbestos extensively in the 20th Century, and because of the long latency period only now are many veterans getting mesothelioma. People were exposed in all branches of the service, in a variety of jobs. We have worked with veterans from all over the country. We can help you find VA resources and medical assistance. Our veterans section goes into more detail or feel free to call us at 1-877-367-6376.
Where can I find information on living with mesothelioma?
Mesothelioma Aid is a good website for resource for families dealing with mesothelioma. It includes advice and referrals to other resources for coping with cancer, caregiving, financial challenges, and support groups. Alternatively, contact us here at Mesothelioma Web for help finding resources for living with this disease.
What Is Mesothelioma?
Mesothelioma is a rare form of cancer in which malignant (cancerous) cells are found in the mesothelium, a protective sac that covers most of the body's internal organs. Most people who develop mesothelioma have worked on jobs where they inhaled asbestos particles.
1. What is the mesothelium?
The mesothelium is a membrane that covers and protects most of the internal organs of the body. It is composed of two layers of cells: One layer immediately surrounds the organ; the other forms a sac around it. The mesothelium produces a lubricating fluid that is released between these layers, allowing moving organs (such as the beating heart and the expanding and contracting lungs) to glide easily against adjacent structures.
The mesothelium has different names, depending on its location in the body. The peritoneum is the mesothelial tissue that covers most of the organs in the abdominal cavity. The pleura is the membrane that surrounds the lungs and lines the wall of the chest cavity. The pericardium covers and protects the heart. The mesothelial tissue surrounding the male internal reproductive organs is called the tunica vaginalis testis. The tunica serosa uteri covers the internal reproductive organs in women.
2. What is mesothelioma?
Mesothelioma (cancer of the mesothelium) is a disease in which cells of the mesothelium become abnormal and divide without control or order. They can invade and damage nearby tissues and organs. Cancer cells can also metastasize (spread) from their original site to other parts of the body. Most cases of mesothelioma begin in the pleura or peritoneum.
3. How common is mesothelioma?
Although reported incidence rates have increased in the past 20 years, mesothelioma is still a relatively rare cancer. About 2,000 new cases of mesothelioma are diagnosed in the United States each year. Mesothelioma occurs more often in men than in women and risk increases with age, but this disease can appear in either men or women at any age.
4. What are the risk factors for mesothelioma?
Working with asbestos is the major risk factor for mesothelioma. A history of asbestos exposure at work is reported in about 70 percent to 80 percent of all cases. However, mesothelioma has been reported in some individuals without any known exposure to asbestos.
Asbestos is the name of a group of minerals that occur naturally as masses of strong, flexible fibers that can be separated into thin threads and woven. Asbestos has been widely used in many industrial products, including cement, brake linings, roof shingles, flooring products, textiles, and insulation. If tiny asbestos particles float in the air, especially during the manufacturing process, they may be inhaled or swallowed, and can cause serious health problems. In addition to mesothelioma, exposure to asbestos increases the risk of lung cancer, asbestosis (a noncancerous, chronic lung ailment), and other cancers, such as those of the larynx and kidney.
Smoking does not appear to increase the risk of mesothelioma. However, the combination of smoking and asbestos exposure significantly increases a person's risk of developing cancer of the air passageways in the lung.
5. Who is at increased risk for developing mesothelioma?
Asbestos has been mined and used commercially since the late 1800s. Its use greatly increased during World War II. Since the early 1940s, millions of American workers have been exposed to asbestos dust. Initially, the risks associated with asbestos exposure were not known. However, an increased risk of developing mesothelioma was later found among shipyard workers, people who work in asbestos mines and mills, producers of asbestos products, workers in the heating and construction industries, and other tradespeople. Today, the U.S. Occupational Safety and Health Administration (OSHA) sets limits for acceptable levels of asbestos exposure in the workplace. People who work with asbestos wear personal protective equipment to lower their risk of exposure.
The risk of asbestos-related disease increases with heavier exposure to asbestos and longer exposure time. However, some individuals with only brief exposures have developed mesothelioma. On the other hand, not all workers who are heavily exposed develop asbestos-related diseases.
There is some evidence that family members and others living with asbestos workers have an increased risk of developing mesothelioma, and possibly other asbestos-related diseases. This risk may be the result of exposure to asbestos dust brought home on the clothing and hair of asbestos workers. To reduce the chance of exposing family members to asbestos fibers, asbestos workers are usually required to shower and change their clothing before leaving the workplace.
6. What are the symptoms of mesothelioma?
Symptoms of mesothelioma may not appear until 30 to 50 years after exposure to asbestos. Shortness of breath and pain in the chest due to an accumulation of fluid in the pleura are often symptoms of pleural mesothelioma. Symptoms of peritoneal mesothelioma include weight loss and abdominal pain and swelling due to a buildup of fluid in the abdomen. Other symptoms of peritoneal mesothelioma may include bowel obstruction, blood clotting abnormalities, anemia, and fever. If the cancer has spread beyond the mesothelium to other parts of the body, symptoms may include pain, trouble swallowing, or swelling of the neck or face.
These symptoms may be caused by mesothelioma or by other, less serious conditions. It is important to see a doctor about any of these symptoms. Only a doctor can make a diagnosis.
7. How is mesothelioma diagnosed?
Diagnosing mesothelioma is often difficult, because the symptoms are similar to those of a number of other conditions. Diagnosis begins with a review of the patient's medical history, including any history of asbestos exposure. A complete physical examination may be performed, including x-rays of the chest or abdomen and lung function tests. A CT (or CAT) scan or an MRI may also be useful. A CT scan is a series of detailed pictures of areas inside the body created by a computer linked to an x-ray machine. In an MRI, a powerful magnet linked to a computer is used to make detailed pictures of areas inside the body. These pictures are viewed on a monitor and can also be printed.
A biopsy is needed to confirm a diagnosis of mesothelioma. In a biopsy, a surgeon or a medical oncologist (a doctor who specializes in diagnosing and treating cancer) removes a sample of tissue for examination under a microscope by a pathologist. A biopsy may be done in different ways, depending on where the abnormal area is located. If the cancer is in the chest, the doctor may perform a thoracoscopy. In this procedure, the doctor makes a small cut through the chest wall and puts a thin, lighted tube called a thoracoscope into the chest between two ribs. Thoracoscopy allows the doctor to look inside the chest and obtain tissue samples. If the cancer is in the abdomen, the doctor may perform a peritoneoscopy. To obtain tissue for examination, the doctor makes a small opening in the abdomen and inserts a special instrument called a peritoneoscope into the abdominal cavity. If these procedures do not yield enough tissue, more extensive diagnostic surgery may be necessary.
If the diagnosis is mesothelioma, the doctor will want to learn the stage (or extent) of the disease. Staging involves more tests in a careful attempt to find out whether the cancer has spread and, if so, to which parts of the body. Knowing the stage of the disease helps the doctor plan treatment.
Mesothelioma is described as localized if the cancer is found only on the membrane surface where it originated. It is classified as advanced if it has spread beyond the original membrane surface to other parts of the body, such as the lymph nodes, lungs, chest wall, or abdominal organs.
8. How is mesothelioma treated?
Treatment for mesothelioma depends on the location of the cancer, the stage of the disease, and the patient's age and general health. Standard treatment options include surgery, radiation therapy, and chemotherapy. Sometimes, these treatments are combined.
* Surgery is a common treatment for mesothelioma. The doctor may remove part of the lining of the chest or abdomen and some of the tissue around it. For cancer of the pleura (pleural mesothelioma), a lung may be removed in an operation called a pneumonectomy. Sometimes part of the diaphragm, the muscle below the lungs that helps with breathing, is also removed.
* Radiation therapy, also called radiotherapy, involves the use of high-energy rays to kill cancer cells and shrink tumors. Radiation therapy affects the cancer cells only in the treated area. The radiation may come from a machine (external radiation) or from putting materials that produce radiation through thin plastic tubes into the area where the cancer cells are found (internal radiation therapy).
* Chemotherapy is the use of anticancer drugs to kill cancer cells throughout the body. Most drugs used to treat mesothelioma are given by injection into a vein (intravenous, or IV). Doctors are also studying the effectiveness of putting chemotherapy directly into the chest or abdomen (intracavitary chemotherapy).
To relieve symptoms and control pain, the doctor may use a needle or a thin tube to drain fluid that has built up in the chest or abdomen. The procedure for removing fluid from the chest is called thoracentesis. Removal of fluid from the abdomen is called paracentesis. Drugs may be given through a tube in the chest to prevent more fluid from accumulating. Radiation therapy and surgery may also be helpful in relieving symptoms.
9. Are new treatments for mesothelioma being studied?
Yes. Because mesothelioma is very hard to control, the National Cancer Institute (NCI) is sponsoring clinical trials (research studies with people) that are designed to find new treatments and better ways to use current treatments. Before any new treatment can be recommended for general use, doctors conduct clinical trials to find out whether the treatment is safe for patients and effective against the disease. Participation in clinical trials is an important treatment option for many patients with mesothelioma.
1. What is the mesothelium?
The mesothelium is a membrane that covers and protects most of the internal organs of the body. It is composed of two layers of cells: One layer immediately surrounds the organ; the other forms a sac around it. The mesothelium produces a lubricating fluid that is released between these layers, allowing moving organs (such as the beating heart and the expanding and contracting lungs) to glide easily against adjacent structures.
The mesothelium has different names, depending on its location in the body. The peritoneum is the mesothelial tissue that covers most of the organs in the abdominal cavity. The pleura is the membrane that surrounds the lungs and lines the wall of the chest cavity. The pericardium covers and protects the heart. The mesothelial tissue surrounding the male internal reproductive organs is called the tunica vaginalis testis. The tunica serosa uteri covers the internal reproductive organs in women.
2. What is mesothelioma?
Mesothelioma (cancer of the mesothelium) is a disease in which cells of the mesothelium become abnormal and divide without control or order. They can invade and damage nearby tissues and organs. Cancer cells can also metastasize (spread) from their original site to other parts of the body. Most cases of mesothelioma begin in the pleura or peritoneum.
3. How common is mesothelioma?
Although reported incidence rates have increased in the past 20 years, mesothelioma is still a relatively rare cancer. About 2,000 new cases of mesothelioma are diagnosed in the United States each year. Mesothelioma occurs more often in men than in women and risk increases with age, but this disease can appear in either men or women at any age.
4. What are the risk factors for mesothelioma?
Working with asbestos is the major risk factor for mesothelioma. A history of asbestos exposure at work is reported in about 70 percent to 80 percent of all cases. However, mesothelioma has been reported in some individuals without any known exposure to asbestos.
Asbestos is the name of a group of minerals that occur naturally as masses of strong, flexible fibers that can be separated into thin threads and woven. Asbestos has been widely used in many industrial products, including cement, brake linings, roof shingles, flooring products, textiles, and insulation. If tiny asbestos particles float in the air, especially during the manufacturing process, they may be inhaled or swallowed, and can cause serious health problems. In addition to mesothelioma, exposure to asbestos increases the risk of lung cancer, asbestosis (a noncancerous, chronic lung ailment), and other cancers, such as those of the larynx and kidney.
Smoking does not appear to increase the risk of mesothelioma. However, the combination of smoking and asbestos exposure significantly increases a person's risk of developing cancer of the air passageways in the lung.
5. Who is at increased risk for developing mesothelioma?
Asbestos has been mined and used commercially since the late 1800s. Its use greatly increased during World War II. Since the early 1940s, millions of American workers have been exposed to asbestos dust. Initially, the risks associated with asbestos exposure were not known. However, an increased risk of developing mesothelioma was later found among shipyard workers, people who work in asbestos mines and mills, producers of asbestos products, workers in the heating and construction industries, and other tradespeople. Today, the U.S. Occupational Safety and Health Administration (OSHA) sets limits for acceptable levels of asbestos exposure in the workplace. People who work with asbestos wear personal protective equipment to lower their risk of exposure.
The risk of asbestos-related disease increases with heavier exposure to asbestos and longer exposure time. However, some individuals with only brief exposures have developed mesothelioma. On the other hand, not all workers who are heavily exposed develop asbestos-related diseases.
There is some evidence that family members and others living with asbestos workers have an increased risk of developing mesothelioma, and possibly other asbestos-related diseases. This risk may be the result of exposure to asbestos dust brought home on the clothing and hair of asbestos workers. To reduce the chance of exposing family members to asbestos fibers, asbestos workers are usually required to shower and change their clothing before leaving the workplace.
6. What are the symptoms of mesothelioma?
Symptoms of mesothelioma may not appear until 30 to 50 years after exposure to asbestos. Shortness of breath and pain in the chest due to an accumulation of fluid in the pleura are often symptoms of pleural mesothelioma. Symptoms of peritoneal mesothelioma include weight loss and abdominal pain and swelling due to a buildup of fluid in the abdomen. Other symptoms of peritoneal mesothelioma may include bowel obstruction, blood clotting abnormalities, anemia, and fever. If the cancer has spread beyond the mesothelium to other parts of the body, symptoms may include pain, trouble swallowing, or swelling of the neck or face.
These symptoms may be caused by mesothelioma or by other, less serious conditions. It is important to see a doctor about any of these symptoms. Only a doctor can make a diagnosis.
7. How is mesothelioma diagnosed?
Diagnosing mesothelioma is often difficult, because the symptoms are similar to those of a number of other conditions. Diagnosis begins with a review of the patient's medical history, including any history of asbestos exposure. A complete physical examination may be performed, including x-rays of the chest or abdomen and lung function tests. A CT (or CAT) scan or an MRI may also be useful. A CT scan is a series of detailed pictures of areas inside the body created by a computer linked to an x-ray machine. In an MRI, a powerful magnet linked to a computer is used to make detailed pictures of areas inside the body. These pictures are viewed on a monitor and can also be printed.
A biopsy is needed to confirm a diagnosis of mesothelioma. In a biopsy, a surgeon or a medical oncologist (a doctor who specializes in diagnosing and treating cancer) removes a sample of tissue for examination under a microscope by a pathologist. A biopsy may be done in different ways, depending on where the abnormal area is located. If the cancer is in the chest, the doctor may perform a thoracoscopy. In this procedure, the doctor makes a small cut through the chest wall and puts a thin, lighted tube called a thoracoscope into the chest between two ribs. Thoracoscopy allows the doctor to look inside the chest and obtain tissue samples. If the cancer is in the abdomen, the doctor may perform a peritoneoscopy. To obtain tissue for examination, the doctor makes a small opening in the abdomen and inserts a special instrument called a peritoneoscope into the abdominal cavity. If these procedures do not yield enough tissue, more extensive diagnostic surgery may be necessary.
If the diagnosis is mesothelioma, the doctor will want to learn the stage (or extent) of the disease. Staging involves more tests in a careful attempt to find out whether the cancer has spread and, if so, to which parts of the body. Knowing the stage of the disease helps the doctor plan treatment.
Mesothelioma is described as localized if the cancer is found only on the membrane surface where it originated. It is classified as advanced if it has spread beyond the original membrane surface to other parts of the body, such as the lymph nodes, lungs, chest wall, or abdominal organs.
8. How is mesothelioma treated?
Treatment for mesothelioma depends on the location of the cancer, the stage of the disease, and the patient's age and general health. Standard treatment options include surgery, radiation therapy, and chemotherapy. Sometimes, these treatments are combined.
* Surgery is a common treatment for mesothelioma. The doctor may remove part of the lining of the chest or abdomen and some of the tissue around it. For cancer of the pleura (pleural mesothelioma), a lung may be removed in an operation called a pneumonectomy. Sometimes part of the diaphragm, the muscle below the lungs that helps with breathing, is also removed.
* Radiation therapy, also called radiotherapy, involves the use of high-energy rays to kill cancer cells and shrink tumors. Radiation therapy affects the cancer cells only in the treated area. The radiation may come from a machine (external radiation) or from putting materials that produce radiation through thin plastic tubes into the area where the cancer cells are found (internal radiation therapy).
* Chemotherapy is the use of anticancer drugs to kill cancer cells throughout the body. Most drugs used to treat mesothelioma are given by injection into a vein (intravenous, or IV). Doctors are also studying the effectiveness of putting chemotherapy directly into the chest or abdomen (intracavitary chemotherapy).
To relieve symptoms and control pain, the doctor may use a needle or a thin tube to drain fluid that has built up in the chest or abdomen. The procedure for removing fluid from the chest is called thoracentesis. Removal of fluid from the abdomen is called paracentesis. Drugs may be given through a tube in the chest to prevent more fluid from accumulating. Radiation therapy and surgery may also be helpful in relieving symptoms.
9. Are new treatments for mesothelioma being studied?
Yes. Because mesothelioma is very hard to control, the National Cancer Institute (NCI) is sponsoring clinical trials (research studies with people) that are designed to find new treatments and better ways to use current treatments. Before any new treatment can be recommended for general use, doctors conduct clinical trials to find out whether the treatment is safe for patients and effective against the disease. Participation in clinical trials is an important treatment option for many patients with mesothelioma.
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