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Mesothelioma Malignant Cure - Mesothelioma Malignant Medicine Drug
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Mesothelioma is a form of cancer that is almost always caused by
previous exposure to asbestos.[1] In this disease, malignant cells
develop in the mesothelium, a protective lining that covers most of
the body's internal organs. Its most common site is the pleura (outer
lining of the lungs and chest cavity), but it may also occur in the
peritoneum (the lining of the abdominal cavity) or the pericardium (a
sac that surrounds the heart).
Most people who develop mesothelioma have worked on jobs where they
inhaled asbestos particles, or have been exposed to asbestos dust and
fibre in other ways, such as by washing the clothes of a family
member who worked with asbestos, or by home renovation using asbestos
cement products. Unlike lung cancer, there is no association between
mesothelioma and smoking.[2]
Contents [hide]
1 Signs and symptoms
2 Diagnosis
3 Screening
4 Staging
5 Pathophysiology
6 Epidemiology
6.1 Incidence
6.2 Risk factors
6.3 Exposure
6.3.1 Occupational
6.3.2 Paraoccupational Secondary Exposure
6.3.3 Asbestos in buildings
6.3.4 Environmental exposures
7 Treatment
7.1 Surgery
7.2 Radiation
7.3 Chemotherapy
7.4 Immunotherapy
7.5 Heated Intraoperative Intraperitoneal Chemotherapy
8 Notable people who died from mesothelioma
9 Notable people that have lived for some time with mesothelioma
10 Legal issues
11 Legal History
12 References
13 See also
14 External links
15 Sources
[edit] Signs and symptoms
Symptoms of mesothelioma may not appear until 20 to 50 years after
exposure to asbestos. Shortness of breath, cough, and pain in the
chest due to an accumulation of fluid in the pleural space are often
symptoms of pleural mesothelioma.
Symptoms of peritoneal mesothelioma include weight loss and cachexia,
abdominal swelling and pain due to ascites (a buildup of fluid in the
abdominal cavity). 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.
Mesothelioma that affects the pleura can cause these signs and symptoms:
chest wall pain
pleural effusion, or fluid surrounding the lung
shortness of breath
fatigue or anemia
wheezing, hoarseness, or cough
blood in the sputum (fluid) coughed up
In severe cases, the person may have many tumor masses. The
individual may develop a pneumothorax, or collapse of the lung. The
disease may metastasize, or spread, to other parts of the body.
Tumors that affect the abdominal cavity often do not cause symptoms
until they are at a late stage. Symptoms include:
abdominal pain
ascites, or an abnormal buildup of fluid in the abdomen
a mass in the abdomen
problems with bowel function
weight loss
In severe cases of the disease, the following signs and symptoms may
be present:
blood clots in the veins, which may cause thrombophlebitis
disseminated intravascular coagulation, a disorder causing severe
bleeding in many body organs
jaundice, or yellowing of the eyes and skin
low blood sugar level
pleural effusion
pulmonary emboli, or blood clots in the arteries of the lungs
severe ascites
A mesothelioma does not usually spread to the bone, brain, or adrenal
glands. Pleural tumors are usually found only on one side of the lungs.
[edit] Diagnosis
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. A history of exposure
to asbestos may increase clinical suspicion for mesothelioma. A
physical examination is performed, followed by chest X-ray and often
lung function tests. The X-ray may reveal pleural thickening commonly
seen after asbestos exposure and increases suspicion of mesothelioma.
A CT (or CAT) scan or an MRI is usually performed. If a large amount
of fluid is present, abnormal cells may be detected by cytology if
this fluid is aspirated with a syringe. For pleural fluid this is
done by a pleural tap or chest drain, in ascites with an paracentesis
or ascitic drain and in a pericardial effusion with
pericardiocentesis. While absence of malignant cells on cytology does
not completely exclude mesothelioma, it makes it much more unlikely,
especially if an alternative diagnosis can be made (e.g.
tuberculosis, heart failure).
If cytology is positive or a plaque is regarded as suspicious, a
biopsy is needed to confirm a diagnosis of mesothelioma. A doctor
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
laparoscopy. To obtain tissue for examination, the doctor makes a
small opening in the abdomen and inserts a special instrument into
the abdominal cavity. If these procedures do not yield enough tissue,
more extensive diagnostic surgery may be necessary.
Doctors have begun testing the Mesomark assay which measures levels
of soluble mesothelin-related proteins (SMRPs) released by diseased
mesothelioma cells. The procedure could diagnose mesothelioma earlier
than conventional methods thus improving the survival prospects for patients.[3]
Typical immunohistochemistry results Positive Negative
EMA (epithelial membrane antigen) in a membranous distribution CEA
(carcinoembryonic antigen)
WT1 (Wilms' tumour 1) B72.3
Calretinin MOC-3 1
Mesothelin-1 CD15
Cytokeratin 5/6 Ber-EP4
HBME-1 (human mesothelial cell 1) TTF-1 (thyroid transcription factor-1)
[edit] Screening
There is no universally agreed protocol for screening people who have
been exposed to asbestos. However some research indicates that the
serum osteopontin level might be useful in screening asbestos-exposed
people for mesothelioma. The level of soluble mesothelin-related
protein is elevated in the serum of about 75% of patients at
diagnosis and it has been suggested that it may be useful for screening.[4]
[edit] Staging
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.
[edit] Pathophysiology
The mesothelium consists of a single layer of flattened to cuboidal
cells forming the epithelial lining of the serous cavities of the
body including the peritoneal, pericardial and pleural cavities.
Deposition of asbestos fibres in the parenchyma of the lung may
result in the penetration of the visceral pleura from where the fibre
can then be carried to the pleural surface, thus leading to the
development of malignant mesothelial plaques. The processes leading
to the development of peritoneal mesothelioma remain unresolved,
although it has been proposed that asbestos fibres from the lung are
transported to the abdomen and associated organs via the lymphatic
system. Additionally, asbestos fibres may be deposited in the gut
after ingestion of sputum contaminated with asbestos fibres.
Pleural contamination with asbestos or other mineral fibres has been
shown to cause cancer. Long thin asbestos fibers (blue asbestos,
amphibole fibers) are more potent carcinogens than "feathery
fibers" (chrysotile or white asbestos fibers).[5] However, there
is now evidence that smaller particles may be more dangerous than the
larger fibers.[1][2] They remain suspended in the air where they can
be inhaled, and may penetrate more easily and deeper into the lungs.
"We probably will find out a lot more about the health aspects
of asbestos from [the World Trade Center attack], unfortunately,"
said Dr. Alan Fein, chief of pulmonary and critical-care medicine at
North Shore-Long Island Jewish Health System. Dr. Fein has treated
several patients for "World Trade Center syndrome" or
respiratory ailments from brief exposures of only a day or two near
the collapsed buildings.[3]
Mesothelioma development in rats has been demonstrated following
intra-pleural inoculation of phosphorylated chrysotile fibres. It has
been suggested that in humans, transport of fibres to the pleura is
critical to the pathogenesis of mesothelioma. This is supported by
the observed recruitment of significant numbers of macrophages and
other cells of the immune system to localised lesions of accumulated
asbestos fibres in the pleural and peritoneal cavities of rats. These
lesions continued to attract and accumulate macrophages as the
disease progressed, and cellular changes within the lesion culminated
in a morphologically malignant tumour.
Experimental evidence suggests that asbestos acts as a complete
carcinogen with the development of mesothelioma occurring in
sequential stages of initiation and promotion. The molecular
mechanisms underlying the malignant transformation of normal
mesothelial cells by asbestos fibres remain unclear despite the
demonstration of its oncogenic capabilities. However, complete in
vitro transformation of normal human mesothelial cells to malignant
phenotype following exposure to asbestos fibres has not yet been
achieved. In general, asbestos fibres are thought to act through
direct physical interactions with the cells of the mesothelium in
conjunction with indirect effects following interaction with
inflammatory cells such as macrophages.
Analysis of the interactions between asbestos fibres and DNA has
shown that phagocytosed fibres are able to make contact with
chromosomes, often adhering to the chromatin fibres or becoming
entangled within the chromosome. This contact between the asbestos
fibre and the chromosomes or structural proteins of the spindle
apparatus can induce complex abnormalities. The most common
abnormality is monosomy of chromosome 22. Other frequent
abnormalities include structural rearrangement of 1p, 3p, 9p and 6q
chromosome arms.
Common gene abnormalities in mesothelioma cell lines include deletion
of the tumor suppressor genes:
Neurofibromatosis type 2 at 22q12
P16INK4A
P14ARF
Asbestos has also been shown to mediate the entry of foreign DNA into
target cells. Incorporation of this foreign DNA may lead to mutations
and oncogenesis by several possible mechanisms:
Inactivation of tumor suppressor genes
Activation of oncogenes
Activation of proto-oncogenes due to incorporation of foreign DNA
containing a promoter region
Activation of DNA repair enzymes, which may be prone to error
Activation of telomerase
Prevention of apoptosis
Asbestos fibres have been shown to alter the function and secretory
properties of macrophages, ultimately creating conditions which
favour the development of mesothelioma. Following asbestos
phagocytosis, macrophages generate increased amounts of hydroxyl
radicals, which are normal by-products of cellular anaerobic
metabolism. However, these free radicals are also known clastogenic
and membrane-active agents thought to promote asbestos
carcinogenicity. These oxidants can participate in the oncogenic
process by directly and indirectly interacting with DNA, modifying membrane-associated
cellular events, including oncogene activation and perturbation of
cellular antioxidant defences.
Asbestos also may possess immunosuppressive properties. For example,
chrysotile fibres have been shown to depress the in vitro
proliferation of phytohemagglutinin-stimulated peripheral blood
lymphocytes, suppress natural killer cell lysis and significantly
reduce lymphokine-activated killer cell viability and recovery.
Furthermore, genetic alterations in asbestos-activated macrophages
may result in the release of potent mesothelial cell mitogens such as
platelet-derived growth factor (PDGF) and transforming growth
factor-ß (TGF-ß) which in turn, may induce the chronic
stimulation and proliferation of mesothelial cells after injury by
asbestos fibres.
[edit] Epidemiology
[edit] Incidence
Although reported incidence rates have increased in the past 20
years, mesothelioma is still a relatively rare cancer. The incidence
is approximately one per 1,000,000. For comparison, populations with
high levels of smoking can have a lung cancer incidence of over 1,000
per 1,000,000. Incidence of malignant mesothelioma currently ranges
from about 7 to 40 per 1,000,000 in industrialized Western nations,
depending on the amount of asbestos exposure of the populations
during the past several decades.[6] It has been estimated that
incidence may have peaked at 15 per 1,000,000 in the United States in
2004. Incidence is expected to continue increasing in other parts of
the world. 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. Approximately one fifth to one third of all
mesotheliomas are peritoneal.
Between 1940 and 1979, approximately 27.5 million people were
occupationally exposed to asbestos in the United States [4]. Between
1973 and 1984, there has been a threefold increase in the diagnosis
of pleural mesothelioma in Caucasian males. From 1980 to the late
1990s, the death rate from mesothelioma in the USA increased from
2,000 per year to 3,000, with men four times more likely to acquire
it than women. These rates may not be accurate, since it is possible
that many cases of mesothelioma are misdiagnosed as adenocarcinoma of
the lung, which is difficult to differentiate from mesothelioma.
[edit] Risk factors
Working with asbestos is the major risk factor for mesothelioma. A
history of asbestos exposure exists in almost all cases. However,
mesothelioma has been reported in some individuals without any known
exposure to asbestos. In rare cases, mesothelioma has also been
associated with irradiation, intrapleural thorium dioxide
(Thorotrast), and inhalation of other fibrous silicates, such as erionite.
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.
The combination of smoking and asbestos exposure significantly
increases a person's risk of developing cancer of the airways (lung
cancer, bronchial carcinoma). The Kent brand of cigarettes used
asbestos in its filters for the first few years of production in the
1950s and some cases of mesothelioma have resulted. Smoking modern
cigarettes does not appear to increase the risk of mesothelioma.
Some studies suggest that simian virus 40 (SV40) may act as a
cofactor in the development of mesothelioma.[7]
[edit] Exposure
Asbestos was known in antiquity, but it wasn't mined and widely used
commercially until 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 publicly 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, and created guidelines
for engineering controls and respirators, protective clothing,
exposure monitoring, hygiene facilities and practices, warning signs,
labeling, recordkeeping, and medical exams. By contrast, the British
Government's Health and Safety Executive (HSE) states formally that
any threshold for mesothelioma must be at a very low level and it is
widely agreed that if any such threshold does exist at all, then it
cannot currently be quantified. For practical purposes, therefore,
HSE does not assume that any such threshold exists. People who work
with asbestos wear personal protective equipment to lower their risk
of exposure.
[edit] Occupational
Exposure to asbestos fibres has been recognised as an occupational
health hazard since the early 1900s. Several epidemiological studies
have associated exposure to asbestos with the development of lesions
such as asbestos bodies in the sputum, pleural plaques, diffuse
pleural thickening, asbestosis, carcinoma of the lung and larynx,
gastrointestinal tumours, and diffuse mesothelioma of the pleura and peritoneum.
The documented presence of asbestos fibres in water supplies and food
products has fostered concerns about the possible impact of long-term
and, as yet, unknown exposure of the general population to these
fibres. Although many authorities consider brief or transient
exposure to asbestos fibres as inconsequential and an unlikely risk
factor, some epidemiologists claim that there is no risk threshold.
Cases of mesothelioma have been found in people whose only exposure
was breathing the air through ventilation systems. Other cases had
very minimal (3 months or less) direct exposure.
Commercial asbestos mining at Wittenoom, Western Australia, occurred
between 1945 and 1966. A cohort study of miners employed at the mine
reported that while no deaths occurred within the first 10 years
after crocidolite exposure, 85 deaths attributable to mesothelioma
had occurred by 1985. By 1994, 539 reported deaths due to
mesothelioma had been reported in Western Australia.
[edit] Paraoccupational Secondary Exposure
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
fibres, asbestos workers are usually required to shower and change
their clothing before leaving the workplace.
[edit] Asbestos in buildings
Many building materials used in both public and domestic premises
prior to the banning of asbestos may contain asbestos. Those
performing renovation works or diy activities may expose themselves
to asbestos dust. In the UK use of Chrysotile asbestos was banned at
the end of 1999. Brown and blue asbestos was banned in the UK around
1985. Buildings built or renovated prior to these dates may contain
asbestos materials.
[edit] Environmental exposures
Incidence of mesothelioma had been found to be higher in populations
living near naturally occuring asbestos. For example, in Cappadocia,
Turkey, an unprecedented mesothelioma epidemic caused 50% of all
deaths in three small villages. Initially, this was attributed to
erionite, however, recently, it has been shown that erionite causes
mesothelioma mostly in families with a genetic predisposition[8].
[edit] Treatment
Treatment of malignant mesothelioma using conventional therapies has
not proved successful and patients have a median survival time of 6 -
12 months after presentation[citation needed]. The clinical behaviour
of the malignancy is affected by several factors including the
continuous mesothelial surface of the pleural cavity which favours
local metastasis via exfoliated cells, invasion to underlying tissue
and other organs within the pleural cavity, and the extremely long
latency period between asbestos exposure and development of the disease.
[edit] Surgery
Surgery, either by itself or used in combination with pre- and
post-operative adjuvant therapies, has proved disappointing. A
pleurectomy/decortication is the most common surgery, in which the
lining of the chest is removed. Less common is an extrapleural
pneumonectomy (EPP), in which the lung, lining of the inside of the
chest, the hemi-diaphragm and the pericardium are removed. It is not
possible to remove the entire mesothelium without killing the patient.
[edit] Radiation
Wikibooks has a book on the topic of
Radiation Oncology/Lung/MesotheliomaFor patients with localized
disease, and who can tolerate a radical surgery, radiation is often
given post-operatively as a consolidative treatment. The entire
hemi-thorax is treated with radiation therapy, often given
simultaneously with chemotherapy. This approach of using surgery
followed by radiation with chemotherapy has been pioneered by the
thoracic oncology team at Brigham & Women's Hospital in
Boston.[9] Delivering radiation and chemotherapy after a radical
surgery has led to extended life expectancy in selected patient
populations with some patients surviving more than 5 years. As part
of a curative approach to mesothelioma, radiotherapy is also commonly
applied to the sites of chest drain insertion, in order to prevent
growth of the tumor along the track in the chest wall.
Although mesothelioma is generally resistant to curative treatment
with radiotherapy alone, palliative treatment regimens are sometimes
used to relieve symptoms arising from tumor growth, such as
obstruction of a major blood vessel. Radiation therapy when given
alone with curative intent has never been shown to improve survival
from mesothelioma. The necessary radiation dose to treat mesothelioma
that has not been surgically removed would be very toxic.
[edit] Chemotherapy
In February 2004, the United States Food and Drug Administration
approved pemetrexed (brand name Alimta) for treatment of malignant
pleural mesothelioma. Pemetrexed is given in combination with
cisplatin. Folic acid is also used to reduce the side-effects of pemetrexed.
[edit] Immunotherapy
Treatment regimens involving immunotherapy have yielded variable
results. For example, intrapleural inoculation of Bacillus
Calmette-Guérin (BCG) in an attempt to boost the immune
response, was found to be of no benefit to the patient (while it may
benefit patients with bladder cancer). Mesothelioma cells proved
susceptible to in vitro lysis by LAK cells following activation by
interleukin-2 (IL-2), but patients undergoing this particular therapy
experienced major side effects. Indeed, this trial was suspended in
view of the unacceptably high levels of IL-2 toxicity and the
severity of side effects such as fever and cachexia. Nonetheless,
other trials involving interferon alpha have proved more encouraging
with 20% of patients experiencing a greater than 50% reduction in
tumor mass combined with minimal side effects.
[edit] Heated Intraoperative Intraperitoneal Chemotherapy
A procedure known as heated intraoperative intraperitoneal
chemotherapy was developed by Paul Sugarbaker at the Washington
Cancer Institute.[9] The surgeon removes as much of the tumor as
possible followed by the direct administration of a chemotherapy
agent, heated to between 40 and 48°C, in the abdomen. The fluid
is perfused for 60 to 120 minutes and then drained.
This technique permits the administration of high concentrations of
selected drugs into the abdominal and pelvic surfaces. Heating the
chemotherapy treatment increases the penetration of the drugs into
tissues. Also, heating itself damages the malignant cells more than
the normal cells.
[edit] Notable people who died from mesothelioma
Mesothelioma, though rare, has had a number of notable patients.
Australian anti-racism activist Bob Bellear died in 2005. British
science fiction writer Michael G. Coney, responsible for nearly 100
works also died in 2005. American film and television actor Paul
Gleason, perhaps best known for his portrayal of Principal Richard
Vernon in the 1985 film The Breakfast Club, died in 2006. Mickie
Most, an English record producer, died of mesothelioma in 2003. Paul
Rudolph, an American architect known for his cubist building designs,
died in 1997.
Bernie Banton was an Australian workers' rights activist, who fought
a long battle for compensation from James Hardie after he contracted
mesothelioma after working for that company. He claimed James Hardie
knew of the dangers of asbestos before he began work with the
substance making insulation for power stations. Mesothelioma
eventually took his life along with his brothers and hundreds of
James Hardie workers. James Hardie made an undisclosed settlement
with Banton only when his mesothelioma had reached its final stages
and he was expected to have no more than 48hrs to live. Australian
Prime Minister-elect Kevin Rudd mentioned Banton's extended struggle
in his acceptance speech after winning the 2007 Australian Federal Election.
Steve McQueen was diagnosed with peritoneal mesothelioma on December
22, 1979. He was not offered surgery or chemotherapy because doctors
felt the cancer was too advanced. McQueen sought alternative
treatments from clinics in Mexico. He died of a heart attack on
November 7, 1980, in Juárez, Mexico, following cancer surgery.
He may have been exposed to asbestos while serving with the U.S.
Marines as a young adultasbestos was then commonly used to
insulate ships' pipingor because of its use as an insulating
material in car racing suits.[10] (It is also reported that he worked
in a shipyard during World War II, where he might have been exposed
to asbestos.[citation needed]
United States Congressman Bruce Vento died of mesothelioma in 2000.
The Bruce Vento Hopebuilder is awarded yearly by his wife at the MARF
Symposium to persons or organizations who have done the most to
support mesothelioma research and advocacy.
After a long period of untreated illness and pain, rock and roll
musician and songwriter Warren Zevon was diagnosed with inoperable
mesothelioma in the fall of 2002. Refusing treatments he believed
might incapacitate him, Zevon focused his energies on recording his
final album The Wind including the song "Keep Me in Your
Heart," which speaks of his failing breath. Zevon died at his
home in Los Angeles, California, on September 7, 2003.
Christie Hennessy, the influential Irish singer-songwriter, died of
mesothelioma in 2007, and had stridently refused to accept the
prognosis in the weeks before his death.[11] His mesothelioma has
been attributed to his younger years spent working on building sites
in London.[12][13]
Bob Miner, one of the founders of Software Development Labs, the
forerunner of Oracle Corporation died of mesothelioma in 1994.
[edit] Notable people that have lived for some time with mesothelioma
Although life expectancy with this disease is typically limited,
there are notable survivors. In July 1982, Stephen Jay Gould was
diagnosed with peritoneal mesothelioma. After his diagnosis, Gould
wrote the "The Median Isn't the Message"[14] for Discover
magazine, in which he argued that statistics such as median survival
are just useful abstractions, not destiny. Gould lived for another
twenty years eventually succumbing to metastatic adenocarcinoma of
the lung, not mesothelioma.
Author Paul Kraus was diagnosed with mesothelioma in June 1997
following an umbilical hernia operation. His prognosis was "a
few months." He continues to survive using a variety of
integrative and complimentary modalities and has written a book about
his experience.
[edit] Legal issues
Main article: asbestos and the law
The first lawsuits against asbestos manufacturers were in 1929. Since
then, many lawsuits have been filed against asbestos manufacturers
and employers, for neglecting to implement safety measures after the
links between asbestos, asbestosis, and mesothelioma became known
(some reports seem to place this as early as 1898). The liability
resulting from the sheer number of lawsuits and people affected has
reached billions of dollars.[citation needed] The amounts and method
of allocating compensation have been the source of many court cases,
and government attempts at resolution of existing and future cases.
[edit] Legal History
The first lawsuit against asbestos manufacturers was brought in 1929.
The parties settled that lawsuit, and as part of the agreement, the
attorneys agreed not to pursue further cases. It was not until 1960
that an article published by Wagner et al first officially
established mesothelioma as a disease arising from exposure to
crocidolite asbestos.[15] The article referred to over 30 case
studies of people who had suffered from mesothelioma in South Africa.
Some exposures were transient and some were mine workers. In 1962
McNulty reported the first diagnosed case of malignant mesothelioma
in an Australian asbestos worker.[16] The worker had worked in the
mill at the asbestos mine in Wittenoom from 1948 to 1950.
In the town of Wittenoom, asbestos-containing mine waste was used to
cover schoolyards and playgrounds. In 1965 an article in the British
Journal of Industrial Medicine established that people who lived in
the neighbourhoods of asbestos factories and mines, but did not work
in them, had contracted mesothelioma.
Despite proof that the dust associated with asbestos mining and
milling causes asbestos related disease, mining began at Wittenoom in
1943 and continued until 1966. In 1974 the first public warnings of
the dangers of blue asbestos were published in a cover story called
"Is this Killer in Your Home?" in Australia's Bulletin
magazine. In 1978 the Western Australian Government decided to phase
out the town of Wittenoom, following the publication of a Health
Dept. booklet, "The Health Hazard at Wittenoom", containing
the results of air sampling and an appraisal of worldwide medical information.
By 1979 the first writs for negligence related to Wittenoom were
issued against CSR and its subsidiary ABA, and the Asbestos Diseases
Society was formed to represent the Wittenoom victims.
[edit] References
^ United States Department of Health and Human Services.
^ "Cigarette smoking, asbestos exposure, and malignant
mesothelioma" by Muscat JE, Wynder EL in Cancer Research (1991)
volume 51 pages 2263-7 Entrez PubMed 2015590
^ Beyer, HL; Geschwindt RD, Glover CL et al. (April 2007).
"MESOMARK: a potential test for malignant pleural
mesothelioma". Clinical Chemistry 53 (4): 666672. PMID 17289801.
^ "Soluble mesothelin-related protein--a blood test for
mesothelioma" by B. W. Robinson, J. Creaney, R. Lake, A. Nowak,
A. W. Musk, N. de Klerk, P. Winzell, K. E. Hellstrom and I. Hellstrom
in Lung Cancer (2005) volume 49, pages S109-S111 Entrez PubMed 15950789.
^ "Malignant mesothelioma and occupational exposure to asbestos:
a clinicopathological correlation of 1445 cases" by V. L.
Roggli, A. Sharma, K. J. Butnor, T. Sporn and R. T. Vollmer in
Ultrastruct Pathol (2002) volume 26 pages 55-65 Entrez PubMed 12036093.
^ "Advances in Malignant Mesothelioma" by Bruce W. S.
Robinson and Richard A. Lake in The New England Journal of Medicine
(2005) volume 353 pages 1591-1603 Entrez PubMed 16221782.
^ "SV40 in human tumors: new documents shed light on the
apparent controversy" by D. S. MacLachlan in Anticancer Res
(2002) volume 22, pages 3495-3499 Entrez PubMed 12552945.
^ Carbone M, Emri S, Dogan AU, et al (2007). "A mesothelioma
epidemic in Cappadocia: scientific developments and unexpected social
outcomes". Nat. Rev. Cancer 7 (2): 14754.
doi:10.1038/nrc2068. PMID 17251920.
^ a b "Resection margins, extrapleural nodal status, and cell
type determine postoperative long-term survival in trimodality
therapy of malignant pleural mesothelioma: results in 183
patients." by D. Sugarbaker in J Thorac Cardiovasc Surg (1999)
volume 117, pages 54-63 Entrez PubMed 9869758.
^ McQueen's Legacy of Laetrile. New York Times (2005-11-15).
^ RTE radio 1, Playback, 8 December
^ u.tv
^ Irish singer Hennessy dies at 62 - BBC News - 11 December 2007
^ Gould, Stephen Jay. The Median Isn't the Message.
^ "Diffuse pleural mesothelioma and asbestos exposure in the
North Western Cape Province" by J. C. Wagner, C. A. Sleggs and
P. Marchand in Br J Ind Med. (1960) volume 17, pages 260-271 Entrez
PubMed 13782506.
^ "Malignant pleural mesothelioma in an asbestos worker" by
J. C. McNulty in Med J Aust (1962) volume 49, pages 953-954 Entrez
PubMed 13932248.
[edit] See also
Mesothelioma Applied Research Foundation
Mesothelioma Research Foundation of America
[edit] External links
ATSDR - Case Studies in Environmental Medicine: Asbestos Toxicity
U.S. Department of Health and Human Service (public domain)
Mesothelioma: Questions and Answers from the U.S. National Cancer Institute
Cancer.gov: Malignant Mesothelioma from the U.S. National Cancer Institute
American Cancer Society from the American Cancer Society
Malignant Mesothelioma review article from the American Cancer Society
CancerBACUP: Mesothelioma Information Centre
Medlineplus: Mesothelioma from MEDLINE, part of the United States
National Library of Medicine
Worksafe, Western Australia, from Western Australia's Department of
Consumer and Employment Protection
US Nat'l Institute for Occupational Safety and Health, from the
Occupational Safety and Health Administration
Australian Mesothelioma Register
[edit] Sources
The first version of this article was adapted from a public domain
U.S. National Cancer Institute fact sheet at http://www.cancer.gov/cancertopics/factsheet/Sites-Types/mesothelioma
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