NEW CANCER TREATMENTS - PROLONGING PATIENT'S LIFE
POSTED INHEALTHNEWS 2017,PUBLIC ACCESS
New treatments prolonging lives
Attendees at a cancer seminar in Singapore heard about the latest in cancer
treatments available to people with breast, ovarian, endometrial, lung and blood
cancers.
Even as cancer becomes more common in Singapore, researchers have discovered
ways to prolong the lives of cancer patients.
That was the message given during a seminar titled Understanding Cancer and
Beyond, which was organised by Channel NewAsia and Parkway Cancer Centre (PCC)
at the Pan Pacific Singapore hotel on 29 July.
Dr Khoo Kei Siong, the Deputy Medical Director of PCC, noted that since the
1970s, cancer survival rates in general have gone up from 25 per cent to 50 per
cent.
However, treatments for certain cancers have seen more progress than others.
Patients with cancers such as testicular cancer, melanoma,prostate cancer,
Hodgkin's lymphoma,breast cancerand uterine cancer are surviving much longer
than before.
However, treatments forliver cancerandpancreatic cancerhave not progressed as
much.
He said that improvements in treatment have been due to three reasons: earlier
detection, effective treatment of micrometastases and better understanding of
the biology of cancer.
Micrometastases is when the cancer has spread but it cannot be seen, even with
sophisticated scans. With better chemotherapy drugs and new treatments like
targeted therapy and immunotherapy, micrometastases can be more effectively
treated and mortality reduced, he said.
A better understanding of the biology of cancer cells also allows doctors to
attack cancer cells more accurately and effectively. Targeted therapy, for
example, looks for specific biomarkers that identify a particular kind of cancer
to find the drug most effective against it.
Targeted therapy and immunotherapy, have also given doctors more tools to fight
cancer. Immunotherapy uses the body's immune system to recognise and fight
cancer cells.
"Because of these trends," said Dr Khoo, "we suspect that cancer treatment will
become increasingly tailored and individualised, based on genetic makeup and
cancer characteristics."
Dr See Hui Ti, a senior consultant in medical oncology, spoke about advances in
the treatment for cancers specific to women. On breast cancer, she noted that
doctors now know who will not benefit from chemotherapy, who will benefit from
chemotherapy before surgery and how to reduce the risk of getting cancer.
Through a genetic array test, oncologists now know which types of breast cancer
are low risk and thus do not need chemotherapy.
Doctors can now also determine who will benefit from getting chemotherapy before
surgery. Some types of breast cancer are very aggressive but respond well to
chemotherapy. By doing chemotherapy before surgery, the operation can conserve
the breast. It also means that we know how well the cancer responds to
chemotherapy.
Some patients will also benefit from risk-reducing surgery. For example,
patients who have a high risk of getting breast cancer, the cancer can be
detected by testing them for a genetic mutation. Likewise, some women have a
genetic mutation which puts them at a high risk of getting ovarian cancer. For
these women, the only way to reduce the risk is to remove both ovaries and the
fallopian tubes before the cancer develops.
On endometrial (womb) cancer, genetic array testing held a lot of promise, she
said. In future, it may allow doctors to use a simple test to identify the kind
of endometrial cancer that a patient has. As a result, some women might not even
need surgery if they had a very slow growing cancer.
On his part,Dr Lim ZiYi, a senior consultant in haematology, spoke about a kind
of immunotherapy called cell therapy. He talked about how T-cells, which the
body uses to fight infection, can be armed with a Chimeric Antigen Receptor
(CAR) so that it can find and kill cancer more effectively.
He recounted the 2015 case of a baby with very aggressive leukaemia who received
1ml of CAR T cells after all conventional treatments failed. "In the fourth or
fifth week, the leukaemia cells started melting away,¡± he noted.
So far, there has been very good data on using cellular therapy for blood
cancers such as acute lymphoblastic leukaemia, lymphoma and myeloma, he said.
Researchers are now looking at using cell therapies on solid tumours.
"We believe that cell therapy is going to be very important going forward, for
the field of treating cancer,¡± said Dr Lim. That is why PCC was looking to bring
cellular therapy to the masses in the next few years, he said.
Dr Lim Hong Liang, a senior consultant in medical oncology, talked about how the
treatment of lung cancer had improved, thanks to targeted treatment and
immunotherapy.
He noted that for mutation-positive lung cancer, targeted therapy and
chemotherapy treatment improved the median survival time to 2.5 to three years,
compared to 12 months from just chemotherapy alone.
In addition, newer forms of immunotherapy such as anti-PD-1 checkpoint
inhibitors had shown to be able to further improve the survival of advanced lung
cancer patients.
He said he was very excited because it was an additional mode of treatment that
was well tolerated and had longer response durations compared to chemotherapy
and targeted therapy. With immunotherapy, the five-year survival rate for lung
cancer was 16 per cent, compared to five per cent without immunotherapy.
Following the presentations, there were panel discussions that covered a wide
range of issues. Among the questions raised were whether stress caused cancer.
In response, Dr See said efforts to prove a direct link between stress and
cancer had failed. However, she noted, stress could lead to activities and
lifestyles that could cause cancer such as smoking and overeating.
Dr Lim ZiYi added that cancer is multifactorial, it could be genetic or due to
the environment, or to diet or smoking. His advice In all things, moderation.
Another question asked was whether there were diets that could prevent
cancer.Senior Dietitian Fahma Sunarjasaid that the best way to lower cancer risk
was to avoid being overweight, to be active, to eat more plant-based foods, and
to limit the consumption of energy-dense foods, processed meat and salted and
preserved foods.
Cancer treatment: The good news
Cancer survival rates have risen from 25 per cent to 50 per cent over the past
40 or so years. Recent breakthroughs spell even better news for some common
cancers.
Breast cancer:Genetic array tests can help reveal low-risk types of breast
cancer that may not require chemotherapy.
Blood cancer:The use of cellular therapy to treat blood cancers such as acute
lymphoblastic leukaemia, lymphoma and myeloma looks promising.
Lung cancer:Immunotherapy has improved the five-year survival rate for lung
cancer, from five per cent to 16 per cent.
What you can do
Avoid activities and lifestyles that can cause cancer, such as smoking and
overeating.
Keep your weight down.
Stay active.
Eat more plant-based foods.
Limit the consumption of energy-dense foods, processed meat, and salted and
preserved foods.
Written byJimmy Yap
Reference extracted from Parkway Cancer Centre/ Health News2017 / Public Access.
Reproduced from...
Tags: blood cancer, cancer latest breakthrough, cancer mutation, chemotherapy,
immunotherapy, metastatic cancer, new ways to treat cancer, stress and cancer,
targeted therapy, women (gynaecological) cancer
Note: This article is reproduced from www.parkwaycancercentre.com