Quantcast

Melanoma: deadliest type of skin cancer is on the rise

May 28, 2014

Canadians need to protect themselves more from dangerous ultraviolet
rays

TORONTO, May 28, 2014 /CNW/ – Melanoma skin cancer is one of the fastest
rising of all cancers in Canada; Canadians need to do more to protect
themselves from damaging ultraviolet (UV) radiation, according to a
special report on skin cancer. Canadian Cancer Statistics 2014 was released today by the Canadian Cancer Society in partnership with
the Public Health Agency of Canada and Statistics Canada.

Skin cancer, including melanoma, is one of the most preventable types of
cancer. The main risk factor is UV radiation from overexposure to the
sun and other sources, such as indoor tanning beds. UV radiation causes
about 90% of melanoma cases.

“It’s important to draw attention to the rising incidence and death
rates for skin cancer so that we can look at ways to be more effective
in tackling this important public health problem,” says Dr Prithwish
De, Epidemiologist, Canadian Cancer Society. “Skin cancer is a largely
preventable disease if Canadians use proper sun protection and do not
use indoor tanning.”

Skin cancer is the most common cancer in Canada, with an estimated 6,500
new cases of malignant melanoma and another 76,100 cases of
non-melanoma skin cancers expected to be diagnosed in 2014. Melanoma is
the deadliest form of skin cancer, with 1,050 Canadians expected to die
from it this year.

While the rate of new cases (incidence) and death rate for many types of
cancer are going down in Canada (all rates are adjusted for age), for
melanoma the story is less positive. According to the current report,
which examined melanoma rates since 1986, melanoma has been increasing
significantly in both men and women.

Risk factors

The main risk for skin cancer is UV radiation through exposure to the
sun or from other sources, such as indoor tanning equipment.

Two national surveys of Canadians’ sun exposure and protective
behaviours conducted over the past 2 decades show that Canadians are
spending more time in the sun without adequate protection.

The proportion of adults who spent 2 or more hours in the summer sun on
a typical summer day during their leisure time increased from 1996 to
2006, and they were more likely to spend at least 2 hours in the sun
while on vacation. Despite this increase in sun exposure, there was no
corresponding increase in the proportion of adults using any of the
recommended forms of sun protection. In fact, significantly fewer
Canadians reported wearing protective clothing and hats in 2006
compared to the decade earlier. As well, fewer adults reported hearing
about or seeing the UV index, a key tool to help plan sun-protective
actions.

“We are concerned that Canadians are spending more time in the sun
without proper protection,” says Dr Robert Nuttall, Director, Cancer
Control Policy, Canadian Cancer Society. “The survey results remind us
of the important role that health organizations, including the Canadian
Cancer Society, have to play in encouraging Canadians to protect
themselves from UV radiation.”

Tanning beds are high-output UV machines that deliver intense doses of
radiation designed to produce rapid and deeply coloured tans. The
amount of radiation emitted has been documented to be many times more
than natural sun at midday in summer. The World Health Organization
classifies tanning beds as a known factor that causes cancer in humans.
According to research, people who first started using indoor tanning
equipment before the age of 35 have a 59% increased risk of melanoma.

A lot of intermittent, intense UV exposure, especially during childhood,
increases the risk of melanoma. People with fair skin (especially skin
that burns easily and tans poorly), red hair or multiple or atypical
moles have at least double the risk for melanoma. It is estimated that
children and adolescents who get 5 or more sunburns have double the
risk for melanoma later in life. A family history of melanoma, which
means having a first-degree relative (parent, sibling or child) with
melanoma, is associated with a 2- to 4-fold increase in the risk of
melanoma. Having a prior diagnosis of melanoma or non-melanoma skin
cancer increases the risk of a subsequent melanoma diagnosis.

Prevention

“The good news is that there are simple ways to protect yourself against
UV radiation,” says Dr Nuttall. Some of the ways are:

        --  Plan outdoor activities before 11 a.m. and after 4 p.m., when
            the sun is not at its strongest, or any time of the day when
            the UV Index is 3 or less.
        --  Seek shade.
        --  Wear protective clothing, broad-brimmed hats and sunglasses.
        --  Use sunscreen properly - apply to all parts of the body that
            are not covered by clothing.
        --  Don't use indoor tanning.

Economic cost of skin cancers in Canada

According to the most recent estimates,* the economic burden of skin
cancer in Canada was $532 million per year. Of that $532 million, 83.4%
was attributable to melanoma and the remainder to the 2 major types of
non-melanoma skin cancer – 9.1% to basal cell carcinoma (BCC) and 7.5%
to squamous cell carcinoma (SCC). It was estimated that the economic
burden of skin cancer would rise to $922 million annually by 2031, with
BCC and SCC accounting for an increasing proportion of costs.

Trends in melanoma incidence and death

Melanoma skin cancer accounts for about 3% of all new cancer cases.
While melanoma is the deadliest form of skin cancer, it represents only
about 1.4% of all cancer deaths because of the good prognosis resulting
from early detection.

The incidence rate of melanoma has increased significantly among men and
women in Canada over the past 25 years. The death rate is also rising,
representing the second greatest increase after liver cancer deaths in
men and lung cancer in women.

        --  One in 59 Canadian men will develop melanoma in his lifetime,
            and 1 in 240 will die from it. In men, the incidence rate
            increased 2% per year between 1986 and 2010, from 9 to 15 cases
            per 100,000. The death rate has increased by 1.2% per year.
        --  One in 73 Canadian women will develop melanoma in her lifetime,
            and 1 in 395 will die from it. In women, the incidence rate
            increased 1.5% per year between 1986 and 2010, from 8 to 12
            cases per 100,000. The death rate increased by 0.4% per year.

Non-melanoma skin cancer (NMSC)

NMSC represents at least 30% of all new cancer cases in Canada, but good
estimates of the true burden of this type of cancer are not available
because, unlike melanoma, it is not routinely reported as part of
cancer surveillance. There are 2 subtypes of NMSC – about 80% of NMSC
is basal cell carcinoma (BCC) and 20% is squamous cell carcinoma (SCC).
BCC is usually slow growing, whereas SCC tends to be more aggressive
and can spread to other parts of the body. The risk factors and ways to
prevent it are the same as for melanoma.

Recommendations from the report

To lower the rising rates of new skin cancer cases and deaths, it is
important for Canadians to:

        --  practise sun safety
        --  not use indoor tanning beds

A long-term commitment to skin cancer prevention is needed so that fewer
Canadians are diagnosed with this type of cancer and more survive.

General highlights – Canadian Cancer Statistics 2014

        --  Cancer continues to be the leading cause of death in Canada.
        --  Over the past 30 years, the death rate for all cancers combined
            has been declining for men and women in most age groups.
        --  There were no significant increases in death rates during the
            past decade for most types of cancer in men and women, with the
            exception of liver cancer in both sexes and lung cancer in
            women.
        --  The 5-year relative survival rate for all cancers combined in
            2006-2008 was 63%, an improvement over the survival rate of 56%
            in 1992-1994.
        --  An estimated 191,300 new cases of cancer (which does not
            include 76,100 cases of non-melanoma skin cancer) and 76,600
            deaths from cancer are expected to occur in Canada in 2014.
        --  Rates of the disease are generally stabilizing for new cases
            and declining for deaths. However, the number of new cancer
            cases and cancer deaths continues to rise as the Canadian
            population grows and ages. Four types of cancer - lung, breast,
            colorectal and prostate - account for 52% of newly diagnosed
            cancers.

“Cancer, in all its forms, has touched many of us in one way or another.
With the help of our partners, we are encouraging Canadians to embrace
healthier lifestyles,” says Minister of Health Rona Ambrose. “As
individuals, we must do what we can to protect ourselves, by covering
up from the sun, eating well, being physically active and not smoking.”

Canadian Cancer Statistics 2014 was prepared through a partnership of the Canadian Cancer Society, the
Public Health Agency of Canada, Statistics Canada and provincial and
territorial cancer registries. For more information about Canadian Cancer Statistics 2014, visit cancer.ca

B-roll is available here: http://cnw.pathfireondemand.com/viewpackage.action?packageid=802

Media backgrounders are available here: http://www.cancer.ca/en/about-us/for-media/media-releases/national/?region=on

* Canadian Partnership Against Cancer. The economic burden of skin
cancer in Canada: current and projected. Final Report: CPAC, Feb. 26,
2010.

About the Canadian Cancer Society

The Canadian Cancer Society is a national, community-based organization
of volunteers whose mission is to eradicate cancer and enhance the
quality of life of people living with cancer. Thanks to our donors and
volunteers, the Society has the most impact, against the most cancers,
in the most communities in Canada. Building on our progress, we are
working with Canadians to change cancer forever. For more information,
visit cancer.ca or call our toll-free bilingual Cancer Information Service at
1-888-939-3333 (TTY 1-866-786-3934).

SOURCE Canadian Cancer Society (National Office)


Source: PR Newswire



comments powered by Disqus