Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Risk of second cancer after breast cancer

09.12.2005


Women with breast cancer face increased risk of developing a second cancer



A new large-scale study on women with breast cancer found a 25 percent increase in the risk of developing a new non-breast cancer compared to women without cancer. The study, published online December 8, 2005 in the International Journal of Cancer, the official journal of the International Union Against Cancer (UICC), is available via Wiley InterScience.

Breast cancer is the most common cancer among women in developed countries. Due to the high five-year survival rate (77 percent), a considerable number of women have a long-term risk of developing a second cancer. Previous studies have shown a 20-30 percent increased risk for a second cancer in various sites, including the endometrium, ovary, thyroid, lung, soft tissue, blood, skin, stomach and colon, with higher risks among younger patients.


Researchers led by Lene Mellemkjær of the Danish Cancer Society in Copenhagen, Denmark conducted a huge study involving 525,527 patients with breast cancer in 13 cancer registries in Europe, Canada, Australia and Singapore. Records were analyzed for second primary cancers during the period 1943 to 2000, with 133,414 women followed for more than 10 years after the initial diagnosis of breast cancer. The increased risk of a second cancer was seen in many different sites, as shown in earlier studies. "The excess of cancer after a breast cancer diagnosis is likely to be explained by treatment for breast cancer and by shared genetic or environmental risk factors although the general excess of cancer suggests that there may be additional explanations such as increased surveillance and general cancer susceptibility," the authors note.

The study found an almost 6-fold increase in the risk of cancer in connective tissue of the thorax and upper limbs, which suggests that radiation therapy, which has been used to treat breast cancer since the beginning of the 20th century, may play a role in developing a second cancer in organs close to the breast. An increased risk of myeloid leukemia was also shown, possibly as a result of chemotherapy. In addition, while previous studies had shown an increased risk of endometrial cancer with the use of tamoxifen, the current study suggests that this may not be entirely due to the drug, since the increased risk was already shown within one year of breast cancer diagnosis, it was shown before 1975 when tamoxifen was rarely used, and an increased risk of breast cancer was also seen after endometrial cancer. Colorectal, kidney and postmenopausal breast cancer appear to share obesity as a risk factor, while ovarian cancer and breast cancer seem to have a genetic predisposition in common. The study found an excess of ovarian cancer already within one year of breast cancer diagnosis, along with an increased risk of breast cancer after ovarian cancer.

"The overall impression from this very large study is that a breast cancer diagnosis has an effect on subsequent cancer risk in general, since so many cancer sites were seen to occur in excess of what was expected," the authors conclude. "The known effects of treatment and common risk factors do not seem to fully explain the excesses."

David Greenberg | EurekAlert!
Further information:
http://www.interscience.wiley.com/journal/ijc

More articles from Health and Medicine:

nachricht Organ-on-a-chip mimics heart's biomechanical properties
23.02.2017 | Vanderbilt University

nachricht Researchers identify cause of hereditary skeletal muscle disorder
22.02.2017 | Klinikum der Universität München

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>