UP TO DATE INFORMATION AND NEWS RELATED TO CANCER RESEARCH AND TREATMENT FOR CANCER PATIENTS AND COMMUNITY.
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Tuesday, 24 December 2013
Sunday, 8 December 2013
ALERT! BREAST CANCER 'RISING IN UNDER-40S' ACROSS EUROPE
A latest information A study in Cancer Epidemilogy found cases rose by about 1% a year between 1990 and 2008 in seven EU countries. Rises in breast cancer rates could be caused by a range of things that can increase the risk of breast cancer, such as women having fewer children and having them later in life, or greater awareness and diagnosis in this group.
My strong recommendation to women after 40 years old is to reduce the risk of breast cancer by keeping active and cutting down on alcohol. Also get to know your breasts and, if you notice any change, tell your doctor without delay.
More info HERE http://www.bbc.co.uk/news/health-24746437
Friday, 15 November 2013
ASPIRIN MAY ACT ON BLOOD PLATELETS TO IMPROVE SURVIVAL IN COLON CANCER PATIENTS
Dr Marlies Reimers talks with ecancer at the 2013 European Cancer Confernece in Amsterdam about how aspirin improves survival in patients diagnosed with colon cancer.
Although previous research has shown that taking low dose aspirin after being diagnosed with colon cancer improves patient outcome, the reasons why this happens remain unknown.
The new research has shown that aspirin improves outcome in patients whose tumour cells express a specific protein on their surface; the protein is known as Human Leukocyte Antigen class I (HLA class I), a cell-surface protein produced by a collection of genes involved in the functioning of the immune system.
The results mean that HLA class I could be used in the future to predict whether or not a patient would benefit from aspirin.
Although previous research has shown that taking low dose aspirin after being diagnosed with colon cancer improves patient outcome, the reasons why this happens remain unknown.
The new research has shown that aspirin improves outcome in patients whose tumour cells express a specific protein on their surface; the protein is known as Human Leukocyte Antigen class I (HLA class I), a cell-surface protein produced by a collection of genes involved in the functioning of the immune system.
The results mean that HLA class I could be used in the future to predict whether or not a patient would benefit from aspirin.
Source: e-cancer
http://ecancer.org/video/2297/aspirin-may-act-on-blood-platelets-to-improve-survival-in-colon-cancer-patients.php
http://ecancer.org/video/2297/aspirin-may-act-on-blood-platelets-to-improve-survival-in-colon-cancer-patients.php
Monday, 4 November 2013
QUICK FACTS ABOUT OVARIAN CANCER
Most cases of ovarian cancer (cancer of the ovary)
develop in women over the age of 50. The cause is not clear. Some ovarian
cancers can be cured. In general, the more advanced the cancer (the more it has
grown and spread), the less chance that treatment will be curative. However,
treatment can often slow the progress of the cancer. Some women with a strong
family history of ovarian cancer may benefit from regular screening.
Luis Mendoza, MD, PhD
Wednesday, 30 October 2013
DIET QUALITY LINKED TO PANCREATIC CANCER RISK
In a large new study of older Americans,
researchers find that people with the healthiest eating habits are about 15
percent less likely to develop pancreatic cancer than those with the poorest
diets.
In the analysis of data on more than 500,000
Americans over age 50, men in particular, especially those who were overweight
or obese, appeared to benefit most from a high quality diet.
"It is important to note that our findings are
based on overall diet and not individual foods. A combination of many foods
contributed to the observed association between greater compliance with the
Dietary Guidelines and lower risk of pancreatic cancer," lead author
Hannah Arem of the National Cancer Institute in Bethesda, Maryland, told
Reuters Health in an email.
Though pancreatic cancer is rare - about 1.5
percent of Americans will develop the disease during their lifetimes - it is
one of the most aggressive and lethal cancers. Only about six percent of people
with pancreatic cancer are still alive five years after diagnosis, according to
Arem.
Past studies looking at the relationship between
diet and risk for pancreatic cancer have tended to focus on individual foods
and found few connections, according to her team's report, published in the
Journal of the National Cancer Institute.
To examine links between overall diet and cancer
risk, Arem and her colleagues used the government-designed Healthy Eating Index
published in 2005 (HEI-2005) as a basis for rating the overall quality of
people's diets.
They applied those criteria to responses from
537,218 men and women who were part of the American Association for Retired
Persons Diet and Health Study. Between 1995 and 1996, participants filled out
diet questionnaires about how often they ate items on a list of 124 foods.
Arem's team then divided participants into five
groups based on how closely their diets met HEI-2005 recommendations for
consuming healthy foods such as fruits, vegetables and whole grains and limiting unhealthy ones, like red meat and
junk foods.
Scores on the index range from 0 (no guidelines
met) to 100 (all guidelines met), with high scores indicating the healthiest
eating patterns.
Using state cancer registries and Social Security
Administration data, the researchers followed participants for about 10 years
and found that 2,383 people developed pancreatic cancer.
About 22 percent of the pancreatic cancer cases
were among people with the lowest HEI-2005 scores, while 19 percent were in
people with the highest scores. Overall, that translates to a 15 percent lower
risk among those with the healthiest diets.
Among men who were overweight or obese, however,
those with healthy eating scores in the top-fifth group were 28 percent less
likely than their counterparts in the bottom-fifth to develop pancreatic
cancer. The same effect was not seen among overweight women.
When the researchers adjusted for other factors
linked to pancreatic cancer risk, including smoking, alcohol consumption and
diabetes, the effects of diet quality remained the same.
Arem's team also looked at specific subgroups of
foods and found that people who ate the greatest amounts of certain healthy
foods, such as dark-green and orange vegetables, legumes, whole grains and low-fat milk had lowered risk for pancreatic
cancer.
The researchers point out in their report, though,
that other recent reviews of the literature have not found similar results for
people who ate lots of fruits and vegetables, for example.
"Our study showed an association between diet
and pancreatic cancer risk, rather than cause and effect. In general,
maintaining a healthy diet has many health benefits," Arem said.
Dr. Rachel Ballard-Barbash, also of the National
Cancer Institute, and her colleagues also note in an editorial accompanying the
new study that attempts to link individual foods or nutrients to cancer risk
have yielded conflicting results.
While some understanding about the relationship
between diet and certain cancers has been gained, that "knowledge has not
yet translated into noticeable reductions in the incidence of the major cancers
with diet-related etiology," they write.
Dr. Alfred Neugut, who studies digestive cancers
and epidemiology but was not involved in the current research, agreed there are
still a lot of unknowns about the links between diet and cancer.
"If you go out of your way to have a healthy
diet, then you're probably going out of your way to be healthy in other
ways," Neugut, a professor of medicine at Columbia Presbyterian Medical
Center in New York, told Reuters Health. So it's difficult to tease out whether
it's really the diet alone that explains the decreased risk seen in the new
study.
"It's always safe to say that it's prudent to
eat a healthy diet," he said. But, he added, "I would say that diet
and cancer is a topic that, despite huge numbers of studies and huge amounts of
money invested, has eluded any dramatic findings."
Friday, 25 October 2013
LOOKING FOR LESSONS IN CANCER´S "MIRACLE" RESPONDERS
Nearly every oncologist can tell the story of
cancer patients who beat the odds, responding so well to treatment that they
continued to live many years disease-free, while most of their peers worsened
and eventually died.
Dr. David Solit decided to find out why.
Solit, an oncologist at Memorial Sloan-Kettering
Cancer Center in New York City, delved into the case of a woman with advanced
bladder cancer who volunteered for a 45-patient study of the Novartis drug Afinitor. He discovered that a combination of
two gene mutations made her particularly receptive to the treatment.
"Every other patient died, but she's without
evidence of disease for more than three years now," said Solit.
Over the past century, such patients - sometimes
called "outliers" or "super responders" - have stood out by
staging remarkable recoveries, or long-term benefit, from cancer drugs that
provide little or no help to others. Little heed has been paid to them because
there was no way to know why they fared so well. In most cases, the drugs that
helped them were abandoned because they helped too few patients.
Now, armed with huge advances in genetic sequencing
technology and growing knowledge of the genetic underpinnings of cancer, a
handful of top academic centers are taking a new look at outlier patients. The
research may lead to new uses for well-known treatments as it becomes clearer
why particular patients respond so well, or even revive drugs left for dead if
the right patient population for the treatment can be identified.
"These experiences have always been out there,
where somebody's grandmother was told she had two months to live and they tried
something and she bounced back," said Dr. Bill Hahn, an oncologist with
the Dana-Farber Cancer Institute. "But nobody ever understood why grandma
responded in such a really amazing way."
The Bethesda, Maryland-based National Cancer
Institute (NCI) and academic researchers it sponsors have just launched
"super responder" initiatives to match patients having little-known
gene mutations to drugs already shown to help others with the same mutations,
even if their tumors are for a variety of organs.
New York's Sloan-Kettering, prompted largely by
Solit's research, aims to create an "outlier" clinic devoted to
explaining exceptional responses. Other projects are underway at Houston's MD
Anderson Cancer Center and Boston's Dana-Farber.
Drugmakers are cautious, if only because they are
sufficiently busy trying to develop new medicines against some 300 identified
cancer gene mutations. With the priority on developing drugs that will help
large numbers of patients, they are reluctant, at least for now, to look
backward to salvage failed drug studies.
"We've tried to develop our drugs very
specifically so we actually develop the drug for the right population of
patients" in the first place, said Sandra Horning, a senior oncology
executive at Roche's Genentech unit.
But Harold Varmus, director of the NCI, says
drugmakers stand to benefit hugely from outlier research.
"(Drugmakers) are struggling now," Varmus
said. "They know there's a lot of genetic damage in tumors, but they don't
know which kind of genetic damage represents the best target for developing new
drugs."
GENOME SEQUENCING AS STEP ONE
Fueling the research is new technology that has
brought the cost of sequencing the human genome down from tens of millions of
dollars to about $5,000. The cost of such analysis is expected to drop to as
little as $1,000 in the next few years.
"It will be cheaper to do your whole genome
sequencing than to get an MRI scan," said Dr. Christopher Austin, director
of the National Center for Advancing Translational Sciences. "When that
happens, identifying whether a mutation is making you an exceptional responder
will be much easier."
Austin expects special-responder research will
eventually link individual gene mutations to totally different ailments beyond
cancer, allowing drugmakers to broaden the use of their medicines.
A tumor sample from Solit's patient underwent whole
genome sequencing - meaning all genes within it were analyzed for mutations, or
variations, in the repeat stretches of compounds called bases that make up the
genetic code.
"She had 17,000 mutations in her tumor that
were not found in her normal cells," Solit said. After months of analyzing
140 mutations that were considered suspects, two of them - genes named TSC1 and
NF2 - stood out.
"It was like, 'Wow,' that's why the patient
was unique, and why even though Afinitor was generally disappointing in the
bladder cancer trial, it was the right drug for her," Solit said. "It
was the combination of both mutations that probably led to her complete response,"
especially the TSC1 mutation.
Zeroing in on the two genes - among more than
20,000 human genes that make proteins - would not have been possible even five
years ago, Solit said. "Maybe we would have looked at one gene and if that
didn't show anything we'd look at another. Now we can sequence the entire
genome and look at every gene, every needle in the haystack, at the same
time."
By linking the TSC1 mutation to bladder cancer,
Solit has discovered a new "biomarker," or suspected link, to the
disease, while simultaneously identifying a possible appropriate drug for
patients with any type of cancer who have that mutation.
The next step, he said, is to develop a diagnostic
test for the TSC1 mutation and use it to screen patients being treated at his
hospital for all varieties of cancer.
"We hope by year's end to be routinely doing
TSC1 testing on large numbers of patients," Solit said. "The mutation
could be important across tumor types."
Once a small group of patients with the mutation is
identified, they would all be treated with Afinitor - which is now approved for
cancers of the breast, kidney and pancreas - regardless of the type of cancer.
"If I was sitting in a pharmaceutical firm and
I read about David Solit's case, I would say, 'Gee, this is a remarkable
change: the mutations that can be found are reasonable targets for developing
drugs,'" the NCI's Varmus said.
RESURRECTING DRUGS, FINDING NEW USES
Hundreds of drugs have been abandoned over the
years after failing clinical trials, although many had their own exceptional
responders.
Some of those drugs could be resurrected, and newer
ones could be saved, if the genetic links are established, Solit said. He sees
Roche's Avastin as a candidate for study for new, or more targeted, uses as
well.
With annual sales of more than $6 billion, Avastin
is approved to treat cancers of the colon, lung and kidney.
The U.S. Food and Drug Administration in late 2011
withdrew its approval of Avastin for breast cancer, three years after clearing
it for the condition. Subsequent research showed the drug was not effective
enough to justify its risks, even though some women had strong responses to the
medicine.
Philippe Bishop, a senior research executive at
Roche's Genentech unit, said exceptional responses have been seen in patients
taking Avastin for breast cancer and other cancers, but no specific genetic
reason has been identified.
To get a clearer picture, the company last year
started an online study called Invite, in which patients who have taken Avastin
are asked to donate a saliva sample for genetic analysis, and to complete a
survey that can help assess whether they had an exceptional response to
Avastin.
"We're trying to correlate what makes them
unique and maybe what part of their genetic makeup makes them do so well,"
Bishop said, adding that exceptional response would be defined as being alive
for a long time without their disease getting worse.
MD Anderson, meanwhile, is encouraging its doctors
to submit tumor samples from exceptional responders in past drug trials for a
detailed genetic analysis.
"We're looking at data from several dozen
trials in a variety of cancers," said senior researcher Dr. Funda
Meric-Bernstam.
She noted exceptional responders also include
patients who fare exceptionally poorly in trials, in terms of side effects or
development of drug resistance. "They are the flip side of the coin, so we
want to know why their tumor outsmarted the drug." That information could
help in designing drugs that sidestep side effects and produce more-prolonged
benefit.
Novartis, like Genentech and other drugmakers, designs its
cancer studies around patients with a single pre-identified cancer-gene
mutation.
But research chief Mark Fishman said the Swiss
drugmaker has also begun routinely sequencing tumors of the patients for
another 300 known cancer-gene mutations before they enter early-stage studies,
an extra step that could help explain eventual exceptional responses to its
drugs.
"In any given patient, if we analyze only one
gene we may not have a complete enough picture of the cancer because sometimes
you have a time bomb sitting in another gene," Fishman said. Such
interaction of cancer genes is a main reason drugs no longer work - why the
cancer recurs - after an initial period of effectiveness from a drug, he said.
Dana-Farber's Hahn said he knows of no trials that
have pulled together patients having the same gene mutation as one already tied
to a special response to a given drug. But Dana-Farber, the NCI and
Sloan-Kettering have such studies on their drawing boards, he said.
The research centers will have to work together
nationally and overseas to find patients with the shared mutations, Hahn said.
"Even if there are only one or two in individual hospitals, you can put
them together and do a trial that has a reasonable number of patients."
An NCI initiative is attempting to recover tumor
samples from exceptional responders in up to 200 U.S. drug trials it has
supported. It will sequence them to find "actionable mutations" that
can be targeted for improved treatment.
"This is an incredibly promising
opportunity," Varmus said, "for us to take advantage of our new
skills and analyze what's really wrong with the cancer cell, and figure out if
we have some ways to destroy that cell."
Saturday, 19 October 2013
CANCER BIGGEST KILLER OF HISPANIC TEXANS
More
Hispanic Texans die from cancer than any other cause, according to a new report
by the Comparative Effectiveness Research on Cancer in Texas research group.
The
report documents cancer as the leading cause of death among Hispanic Texans
under the age of 76. Only three percent of Hispanic Texans are older than 75.
Texas's
Hispanic population has more than doubled since 1990. Texans of Hispanic
ethnicity now comprise 38 percent of the state's population.
The
findings are published in a September 2013 special issue of the Texas Public
Health Journal, available online at http://txcercit.org/.
Based
on data from the Texas Cancer Registry, Medicare claims records and state vital
statistics, researchers compared rates and trends for cancer in Hispanics to
those for non-Hispanic whites in Texas. Key findings include:
These
findings were based on 10 years of data about the diagnoses of new cancer cases
and 21 years of data about cancer deaths.
The
CERCIT researchers noted one puzzling contradiction. Even though cancers tend
to be more advanced when diagnosed in Hispanics, death rates were lower than in
the white population. This phenomenon, known as the Hispanic Paradox, has been
noted before by other researchers looking at disease and survival rates across
the spectrum. Hispanic Americans tend to survive illness and live longer than
white Americans with the same diseases even though the Hispanics have less
education, income and access to health care.
Foreign-born
Hispanics had lower mortality rates than those born in the United States,
according to analyses of regional differences within the state.
Saturday, 12 October 2013
CASE REPORT SHOWS TATTOOS MAY HIDE MELANOMA
Melanoma
may be hiding in pigmented tattoos, according to a new case
report published in JAMA
Dermatology. Clinicians from Germany recently published a case report
detailing a young white man with a malignant melanoma that developed on a nevus
within a large tattoo.
The
clinicians, led by Laura Pohl, MD, of Laserklinik Karlsruhe, Germany, reported
the case in the hope that other colleagues may help them to gather additional
information on similar cases of melanoma developing within tattoos, in addition
to the 16 cases already reported in English literature.
“Pigmented
lesions in decorative tattoos cause diagnostic difficulties at a clinical and
dermoscopic level. In cases of laser removal of tattoos, hidden suspicious nevi
may be revealed gradually,” the researchers stated.
According
to background information in the case, “the number of decorative tattoos has
been increasing, as has the demand for their removal by laser devices.” In this
case, a man aged 29 years presented to the clinic for removal of large tattoos
that covered most of his chest and arms.
Upon
examination of his skin, the clinicians noticed a nevus on his shoulder and
advised that it be excised. However, the patient refused excision.
With
informed consent, the clinicians began removal of the tattoos in March 2002
with a Q-switched Nd:YAG laser, switching to a Q-switched alexandrite laser
after loss of response after 43 sessions.
By November
2009, the clinicians refused to continue laser removal of the tattoo without
excision of the nevus. The patient consented.
“At that
time, dermoscopy findings showed characteristics of an early melanoma,” the
clinicians wrote. “The excisional biopsy results showed the lesion to be a
Clark level II malignant melanoma with a Breslow thickness of 0.45 mm.”
Based on
their experience with this case, the Dr. Pohl and colleagues made several
recommendations. First, skin examination should take place prior to laser
tattoo removal, and, if suspicious nevi are found, treatment should be withheld
until excision occurs. In addition, clinicians should continue to conduct skin
examinations throughout the process of laser tattoo removal. Finally, the
clinicians recommended that tattoos never be placed on a pigmented lesion in
the skin.
Source:
Monday, 30 September 2013
ALZHEIMER´S TIED TO LESS CANCER, AND VICE VERSA.
Alzheimer's tied to less
cancer, and vice versa
People
with Alzheimer's disease have a lower risk of cancer than other elderly adults,
a new Italian study suggests.
Additionally,
researchers found that seniors who were diagnosed with cancer were less likely
to develop Alzheimer's.
Researchers
said there are a number of genes that affect both neurology and cancer growth - and pathways by which the two are connected - that
could explain the "unexpected" inverse link between the diseases.
"Cancer
and Alzheimer's have been viewed by researchers as completely separate,"
said Dr. Massimo Musicco, who led the study at the National Research Council of
Italy's Institute of Biomedical Technologies in Milan.
"Some
of the knowledge that we have on cancer can be used for a better understanding
of what happens when a person has Alzheimer's disease, and vice versa," he
said.
There are
convincing data that Parkinson's disease is tied to a lower risk of cancer,
said Dr. Jane Driver, who studies aging at Brigham and Women's Hospital in
Boston.
More
recently, the same pattern has been showing up for other neurological
disorders, including schizophrenia and Alzheimer's, she noted.
But
earlier studies haven't been able to rule out whether Alzheimer's disease might
be keeping cancer symptoms from being noticed - or vice versa - or if people
who die from one disease just have less time to be diagnosed with the other.
In their
study, Musicco and his colleagues found people who ultimately were diagnosed
with Alzheimer's had a lower risk of cancer both leading up to and after their
diagnosis.
Likewise
those with cancer were less likely to get Alzheimer's both before and after the
cancer was caught.
"I'm
hoping this will then convince all the doubters that there is a true inverse
association between Alzheimer's, Parkinson's and probably some other neurologic
diseases and cancer," Driver told Reuters Health.
Musicco
and his team tracked new cancer and Alzheimer's diagnoses among 204,000 people
age 60 and older living in Northern Italy.
Between
2004 and 2009, just over 21,000 of them were diagnosed with cancer and close to
3,000 with Alzheimer's disease. There were 161 people diagnosed with both
diseases.
The
researchers calculated that 246 cases of Alzheimer's disease would be expected
in members of the cancer group, based on their age and gender balance, and 281
cancers would be predicted among those with Alzheimer's.
The lower
rates meant that people with cancer were 35 percent less likely to develop
Alzheimer's disease than other adults, the researchers wrote in the journal
Neurology. And those with Alzheimer's had a 43 percent lower risk of cancer.
Source:
NBC News Health
Sunday, 22 September 2013
THE TALLER THE WOMAN, THE HIGHER HER CANCER RISK
The ability to reach items on high shelves and
easily see through a crowd may no longer have the same appeal for some women. A
study recently published in Cancer Epidemiology, Biomarkers & Prevention
finds a link between postmenopausal women's height and cancers.
According to the study, the taller a woman's stature is, the higher her risk of cancer at a number of different sites, including
breast, colon, endometrium, kidney, ovary, rectum and thyroid. Additionally,
taller women have a greater risk of developing multiple
myeloma
and melanoma.
All of these associations did not change after adjusting for known
influencers of these cancers, such as age, weight, education, smoking habits, alcohol intake and
hormone therapy. The researchers say that height even had more influence over
cancer risk than a common measure of obesity, body mass index (BMI).
Researchers studied 144,701 women aged 50 to 79 who participated in the
Women's Health Initiative from 1993 to 1998. After a follow-up 12 years later,
in total, 20,928 cancers were identified within the group.
Results showed that for every 10-centimeter
increase in height (3.94 inches), there was a 13% increase in likelihood of
developing cancer.
Specifically:
·
An increase in risk of 13-17% for breast, ovary, endometrium and colon
cancers,
as well as for melanoma, and
·
An increase in risk of 23-29% for kidney, rectum, thyroid and blood
cancers.
There were 19 cancers studied in total, none of which displayed a
negative association with height.
Geoffrey Kabat - senior epidemiologist in the department of epidemiology
and population health at Albert Einstein College of Medicine, Yeshiva
University, New York, NY - says:
"We were surprised at the number of cancer
sites that were positively associated with height. In this data set, more
cancers are associated with height than were associated with body mass index.
Ultimately, cancer is a result of processes
having to do with growth, so it makes sense that hormones or other growth
factors that influence height may also influence cancer risk."
Various studies in the past have looked at personal characteristics in
relation to cancers. For example, a recent study linked
height and BMI to ovarian cancer. An interesting note made by the current
researchers is that both height and BMI have been increasing by about 1 cm each
decade in high-income countries, potentially increasing the risk for cancer in
the process.
Few previous studies have adjusted for other known influencers of cancer
when researching the effect of height.
Dr. Geoffrey Kabat makes the obvious point that, unlike other risk factors
such as diet and lifestyle, height is not something we can change. He adds,
however:
"Although it is not a modifiable risk factor, the association of
height with a number of cancer sites suggests that exposures in early life,
including nutrition, play a role in influencing a person's risk of
cancer."
While the researchers found an association
between cancer and height, the medical evidence shows it is a complex disease
that cannot be linked purely to one factor.
Wednesday, 11 September 2013
SURGEON´S SMART KNIFE DETECT CANCER CELLS IN TUMOUR OPERATIONS
When surgeons remove tumor tissue they try to leave a "margin" of healthy tissue to
ensure all the cancer is removed. Sometimes this means the patient has to remain under
general anaesthetic for another 30 minutes or so while tissue samples are sent
for analysis to check if the margin is clear. Even then, it is still possible
that some cancerous tissue remains, and the patient has to undergo further
surgery to remove it.
Now, a new technique based on an "intelligent knife," called
the "iKnife," promises to remove the need for lab analysis and
the accompanying delay, and it also helps avoid repeat surgeries.
The iKnife sniffs the "smoke" created by the electrosurgical
removal of cancerous tissue and tells the surgeon almost immediately if the
tissue it has come from is healthy or cancerous.
This first study appears online this week in Science Translational
Medicine, in which the iKnife is tested in the operating room.
In tissue samples from 91 patients, researchers at Imperial College
London using the iKnife achieved 100% accuracy in diagnosing whether the
samples were cancerous or not.
Study author Dr. Zoltan Takats is the inventor of the iKnife. Asked if
his new surgical tool would be confined to use in only certain types of cancer,
he told Medical News Today:
"It
is a generally applicable tool, we believe it will be useful for many different
types of cancer surgeries."
On the question of cost-effectiveness, Dr. Takats told us:
"We
believe that it will be a cost-saver - due to elimination of intraoperative
histology, shorter intervention times and lower rate of re-operations."
iKnife combines electrosurgery with new mass
spectrometry techniques
The iKnife is a combination of an established technology called electrosurgery
that was invented in the 1920s and a new technology that is still emerging,
called rapid evaporative ionization mass spectrometry (REIMS).
In electrosurgery, the surgeon's knife delivers an electric current that
heats the target tissue and cuts through it while causing minimum loss of
blood.
The heat from the current vaporizes the tissue, which gives off a smoke
that is normally sucked away with an extractor.
The mass spectrometer technology behind REIMS almost instantly
identifies the chemicals present in human tissue by analyzing the smoke that is
released during electrosurgery.
Cells produce thousands of metabolites in various concentrations,
depeding on their cell type. So once the REIMS technology is primed with the
profiles of healthy and cancerous cells, it can rapidly use these to screen the
sample of smoke and inform the surgeon whether it is from a tumor or healthy
tissue.
Results delivered in under 3 seconds
By comparing the chemical profile of the tissue it is sampling to the
reference library, the iKnife can deliver a result in under 3 seconds, say the
researchers.
But for this study, the surgeons carrying out the procedures were not
allowed to see the nearly instant readings from the iKnife.
The researchers now hope to run a clinical trial that tests whether
giving surgeons access to iKnife readings during operations improves outcomes
for patients.
Dr. Takats says in a statement:
"These results provide compelling evidence that the iKnife can be
applied in a wide range of cancer surgery procedures."
As the technology delivers almost instant results, it allows
"surgeons to carry out procedures with a level of accuracy that hasn't
been possible before", he adds, noting that they "believe it has the
potential to reduce tumor recurrence rates and enable more patients to
survive."
Source: Medical News Today
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