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Causes and Prevention from Pancreatic Cancer
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Even though
there is no definitive way for an individual to
prevent pancreatic
cancer,
there are simple guidelines which can reduce the
risk. |
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Smoking:
The inhalation of cigarette smoke
is the number one reason any individual will
develop
cancer. If an individual smokes, it actually
takes their lungs 15 years to stabilize to that
of a healthy individual's lungs. In essence, do
not smoke. |
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However, if an individual does
smoke, he/she should consult their local doctor
on ways to quit. |
Healthy Weight:
Some doctors will advise individuals to refer to
the
body
mass index, while other doctors would disagree,
claiming "every individual is different." Either
way the message is clear; stay in shape. Being
overweight actually increases the risk of
pancreatic
cancer by tenfold. If an individual is
interested in losing weight, he/she should
contact their local physician first. Once, the
doctor has advise the individual in the correct
steps, he/she should also implement a regimented
diet, in order to produce the best results.
Exercise:
A sedentary lifestyle can actually increase
individual's risk of several different diseases,
including pancreatic
cancer.
However, an active lifestyle can harness an
individual's entire external make up, there in
turn reforming their internal make up. This
alteration will allow the person's organ system
to run smooth, create a strong a immune system,
and build a tight bone structure. Each person
should remain active for the recommended amount
of daily exercise; 30 minutes. Depending on the
person's physical shape, he/she should start off
slow, and work up to a certain goal.
Healthy Diet:
Recent studies have shown that a healthy diet
can decrease the percentage of developing
pancreatic
cancer at one point in a person's lifetime.
Although every individual is different, it is
important to stick to nutritious diet full of
fruits, vegetables, and whole grains in order to
reduce their risk. Several studies done in 2006
concluded that Vitamin D can actually cut an
individuals chance of developing pancreatic
cancer
by 50%. Other vitamins that have been known to
have a positive effect on the decrease in
pancreatic
cancer risks are Vitamins B12, Vitamins B6,
and Folate. |
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Types of Pancreatic
Cancer:
Pancreatic
cancer
can originate in both the exocrine and the
endocrine cells of the pancreas. Both cell types
can form two very contrasting forms of tumors.
The exocrine cells are more likely to develop
cancer.
The symptoms of exocrine cell
cancer
and endocrine cell
cancer
are different and are discovered using differing
tests. Pancreatic tumors can be both benign
(non-cancerous) and malignant (cancerous). What
is the Pancreas Function? To understand how both
exocrine and endocrine pancreatic cancers affect
the pancreas, it is important to understand the
functions of the organ. The pancreas, located
behind the stomach, made up of two different
types of glands. These are the exocrine and
endocrine glands. The exocrine glands (making up
95 percent of the pancreatic tissue) are
responsible for creating what is referred to as
pancreatic "juice," a substance that is sent to
the intestines through ducts. This substance is
comprised of enzymes that assist in digesting
the food a person eats. They digest fats,
proteins and carbohydrates. This makes the
pancreas extremely important in the process of
digestion. The endocrine cells, making up a
smaller total of the pancreatic tissue, are
arranged in groups called islets. These islets
are responsible for releasing special hormones,
including insulin and glucagon into the
bloodstream. Insulin is a substance that
reducing the amount of sugar in the blood and
glucagon increases the sugar level. Diabetes
occurs when the pancreas is not releasing
insulin. Exocrine Tumors of the Pancreas The
most common form of pancreatic
cancer,
pancreatic
cancer almost always refers to a type of
exocrine tumor. |
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While exocrine
tumors (and even cysts) can sometimes be benign,
in most cases, they are malignant.
Adenocarcinoma: Adenocarcinoma, a type of
cancer
that can begin in the glands of several
different organs, is the most common form of
pancreatic
cancer, making up about 90 to 95 percent of
all cases of pancreatic
cancer.
Usually originating in the ducts of the
pancreas, adenomcarinoma can also start in the
cells that comprise the enzyme-producing glands.
Ampullary
Cancer: Also known as carcinoma of the
ampulla of Vater is a type of
cancer
that develops in the area where the bile duct
and pancreatic duct meet and drain into the
duodenum. This area is called ampulla of Vater.
This
cancer
blocks the bile duct and can cause a build up of
bile within the
body.
This leads to yellowing of the eyes and skin
(jaundice), and darkening of the urine. These
distinct symptoms allow ampullary
cancer
to be detected early and as a result, are
usually more successfully treated than other
forms of pancreatic
cancer.
Other Types of Exocrine Tumors: There are also
less common ductal cancers of the pancreas. One
of them being adenosquamous carcinoma, a type of
cancer
that contains squamous cells which are thin and
flat, and gland-like cells. Squamous cell
carcinoma can affect the pancreas, which is a
type of malignant tumor. Finally, giant cell
carcinomas can develop in the pancreas, a type
of malignant tumor that is characterized by the
larger-than-normal size of the cells. Treatment
for Exocrine Tumors: Although the pancreas may
develop several types of tumors, the treatment
is not dependent on type, but rather the stage
of the
cancer. The stage of the
cancer
is a system used by physicians to describe how
large the tumor is and how far it has spread
through surrounding tissue and distant parts of
the
body.
Endocrine Tumors of the Pancreas Endocrine
tumors are very rare. They are often referred to
as pancreatic neuroendocrine tumors (NETs) or
simply islet cell tumors. Endocrine tumors of
the pancreas come in several forms, usually
classified by which type of cells are affected
and the hormone they produce. |
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Insulinomas is a tumor that
develops in cells that create insulin; |
Glucagonomas is a tumor that is
formed in cells that create glucagon; |
Gastrinomas
is a tumor that is formed in cells that release
gastrin; |
Somatostatinomas is a tumor that is created in
cells that make somatostatin |
VIPomas is a tumor that
originates in cells that create vasoactive
intestinal peptide (VIP); |
PPomas is a tumor that starts in
cells that create pancreatic polypeptide.| |
Tumors of the endocrine pancreas
cells are usually "functioning" tumors, meaning
that the tumors themselves release hormones into
the
body.
Some tumors, however, do not release hormones
into the bloodstream and they are called
"non-functioning." Endocrine tumors are both
benign (pancreatic neuroendocrine tumors) and
malignant (pancreatic neuroendocrine
carcinomas). It is very tough for physicians to
determine the difference between a benign and
malignant tumor, so diagnosis is not always
clear up front. It usually takes some time to
wait for the tumor to react to finally reach a
conclusion.
About 1 percent of all pancreatic cancers are
pancreatic neuroendocrine carcinomas. Treatment
of the tumor generally depends on the stage of
the
cancer
and the outlook is almost always better than
exocrine pancreatic cancers. The two most common
forms of pancreatic endocrine tumors are
gastrinomas and insulinomas. The other types
rarely occur. Exocrine
and endocrine pancreatic cancers are very
different from each other. They have different
symptoms, diagnosis methods, treatments, and
prognoses. |
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Pancreatic Cancer Symptoms and Research:
Pancreatic
cancer is a deadly form of
cancer
due to its few symptoms during its early stages.
When pancreatic
cancer
does begin to show symptoms, then it is usually
in an advanced stage where it has spread to
nearby organs and tissue. Early detection has
been a problem that many researchers have been
looking into for pancreatic
cancer.
There have been several breakthroughs in
technology that look for promising for the
future. In addition, new ways of treating
pancreatic
cancer are also being researched, along with
ways in improving currently existing treatments.
Pancreatic
Cancer Research in Early Detection Many
scientists have been researching genetics to
lead to a discovery for effective early
detection of pancreatic
cancer.
Researchers are examining the changes to DNA
that are present as cells in the pancreas begin
to divide into cancerous cells. Some research
indicates that certain genes contribute to
increase risks of pancreatic
cancer.
Other research is being focused on what is
called the K-ras oncogene and how changes in DNA
affect cell division. Samples of pancreatic
juice suggest can be tested and the results may
determine this. Also, endoscopic ultrasound
tests, a fairly new technology have shown
promising results for early detection of
treatable pancreatic
cancer.
This, along with DNA testing show that one day
early detection for people considered high at
risk for pancreatic
cancer
will be one day possible through relatively
simple tests. Pancreatic
Cancer
Research in Treatment Aside from early
detection, extensive research in improving
pancreatic treatment are diligently being looked
into by scientists. Surgery and radiation
techniques are two primary research vehicles for
pancreatic
cancer treatment and how they can be better
improved to increase the likelihood of a full
patient recovery. They are also concerned with
choosing the treatment option that is best for
each stage of the
cancer.
Chemotherapy: New chemotherapy drugs are tested
for many different types of
cancer,
as well as drugs used primarily for pancreatic
cancer.
The standard drugs to treat pancreatic
cancer
include gemcitabine and 5-FU. Researchers are
testing combinations of these two standard drugs
with newly developed chemotherapy drugs, such as
cisplatin, oxaliplatin, docetaxel, irinotecan,
and pemetrexed. In addition, combinations of
chemotherapy and other treatment options are
being experimented, such as using a blend of
chemotherapy and radiation therapy together.
Another goal is to determine which chemotherapy
drugs come with the least amount of
side-effects, especially long-term side effects
that can plague a patient, such as kidney
damage. Targeted Therapy: Currently, researchers
are learning more and more about the difference
between normal pancreatic cells and pancreatic
cancer
cells. This is useful, because new target
treatment plans are beginning to be developed.
Researchers are looking into different
treatments that only affect cells with
cancer
characteristics. This approach takes a more
focused effort into fighting the disease and
helps to minimize side effects that are usually
apparent in chemotherapy. Searching for new
characteristics to target is an ongoing research
effort. Growth Factor Inhibitors: Scientists
have discovered growth factor receptors on the
surface of
cancer cells. These are molecules that help
a
cancer
cell to grow and divide at a rapid rate and are
found in pancreatic
cancer
cells. Drugs that target these molecules are
currently being researched heavily. The current
known ones are erlotinib and gemcitabine, both
of which have been approved for use for
cancer
treatment. Anti-angiogenesis Factors:
Cancers,
including pancreatic
cancer,
rely on blood vessels to help replenish their
cells with nutrients. Researchers are
discovering ways to block these blood vessels so
that the tumor does not receive nutrients, and
in turn, the
cancer cells begin to die. This is a type of
treatment that is currently being studied in
clinical trials and is being researched for use
in pancreatic
cancer
treatment. Other Targeted Therapies: Other
targeted therapies are also being studied.
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They are
treatments that target
cancer cell functions, such
as farnesyl transferase, a
special enzyme that stimulates
cancer growth. Drugs are
being developed to destroy this
enzyme. Other targets are also
being discovered. Immune Therapy
in Pancreatic
Cancer Research Immune
therapy is a type of treatment
that is designed to boost a
person's immune system so that
it can better target and attack
cancer cells. This type of
treatment has shown many
promising initial results.
Vaccines are also being
developed that equip a person's
immune system to attack
cancer cells as soon as they
begin to grow inside a person.
The immune system, theoretically
will identify
cancer cells as being
foreign invaders and destroy
them. Tumors can then be
prevented, shrunk, and inhibited
from returning in a relatively
safe process. Another immune
therapy being tested to combat
pancreatic
cancer is called monoclonal
antibodies, a man made protein
that is injected into a patient.
These proteins target specific
aspects of
cancer cells to inhibit
their growth. Toxins and
radioactive atoms can be
attached to these proteins and
they theoretically can be
carried to tumor cells. This
treatment is designed so that
normal cells are unharmed during
treatment. This is only in the
clinical testing stage. Low
Molecular Weight Heparin in
Pancreatic Research Researchers
discovered that by giving
patients with advanced stages of
pancreatic
cancer chemotherapy along
with a substance called low
molecular weight heparin (LMWH),
the chemotherapy showed signs of
working more effectively. In
this test, tumors shrunk further
than with chemotherapy alone.
Normally, LMWH is given to treat
patients with blood clots
because it acts as a blood
thinner. Patients who received
LMWH also lived longer as well.
Currently, clinical trials are
testing to see if these initial
results are accurate and hold
true for all patients.
Individualization of Therapy in
Pancreatic Research Researchers
have discovered the possibility
that certain drugs work only on
certain patients. This usually
depends on which type of
mutations are found on a
patient's pancreatic tumor. The
ability to know which drugs
would work on certain
individuals before treatment is
administered is an exciting
prospect in
cancer research and is under
extensive study. |
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Pancreatic Cancer Screening:
Unfortunately,
pancreatic
cancer is a very difficult
condition to detect early. This
is because the pancreas is an
organ that is deep inside the
body under the stomach and
cannot be thoroughly examined by
a physician during a standard
exam for early staged tumors.
Also, there are no obvious
symptoms of pancreas
cancer early on in its
development. Instead, pancreas
cancer begins to show
symptoms after it has already
spread to other surrounding
organs. To add more difficulty,
there are no blood tests that
are accurate in finding early
stages of pancreatic
cancer. There is, however, a
number of promising techniques
that are currently being tested
and a lot of research is going
into pancreatic
cancer to find advanced ways
of detecting it in its treatable
phases. Endoscopic Ultrasounds:
An endoscopic ultrasound is a
new advanced form of the
commonly used ultrasound device.
It uses sound waves to create
detailed images on a monitor,
but it uses a special instrument
that is sent through a patient's
mouth or rectum. It can also be
used to take biopsy tissue
samples at the same time. Blood
Tests: Blood tests are not a
viable method of screening for
pancreatic
cancer. A substance called
CA19-9 can be detected in blood
when pancreatic
cancer is present, but the
levels of CA19-9 are not high
enough to be detected until the
cancer is in an advance
stage. The CA19-9 blood test is,
however, used during the
treatment of pancreatic
cancer to see if it is
working or after to see if the
cancer has returned. Genetic
Testing: Many researchers
believe that genetic testing is
one key to finding a useful
screening method for pancreatic
cancer. DNA that is
inherited can cause as much as
10 percent of all cases of
pancreatic
cancer. These same DNA
attributes can also be linked to
other forms of
cancer, so it is not an easy
process. People who have a
family history of
cancer may want to talk to a
doctor who specializes inherited
diseases and conditions, such as
a genetic counselor, or
geneticist. A person who would
like to receive genetic testing
should know the risks and
benefits of doing so first. |
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