Featured Research

from universities, journals, and other organizations

Higher incidence of secondary breast cancer seen among black women regardless of age

Date:
September 19, 2011
Source:
American Association for Cancer Research
Summary:
The overall incidence of breast cancer is generally higher among white women than black women; however, the incidence of a second breast cancer in the opposite breast is higher among black women, according to a new study.

The overall incidence of breast cancer is generally higher among white women than black women; however, the incidence of a second breast cancer in the opposite breast is higher among black women, according to a study presented at the Fourth AACR Conference on The Science of Cancer Health Disparities, held here Sept. 18-21, 2011.

When cancer is diagnosed in women younger than 45 years old, the incidence of primary breast cancer is higher among blacks than among whites and the cancer tends to be more aggressive.

"When the disease does occur in blacks early on, it tends to be more aggressive, more likely to be estrogen-receptor negative and it is more likely to cause death," said lead researcher Nsouli-Maktabi Hala, a Ph.D. graduate of The George Washington University.

The researchers also found that when cancer is diagnosed at an older age, the incidence is higher among white women. Since most breast cancers are diagnosed in older women, the overall incidence is higher in whites, explained Maktabi.

"While the incidence of breast cancer is generally higher among whites for first-time diagnosis, we found the incidence of the second contralateral diagnosis was higher among blacks," said Maktabi. "This was unexpected -- blacks usually have a higher mortality rate than whites from the first cancer, so you would expect blacks to have lower rates of second cancers."

"Usually, about 4 percent of all breast cancer patients will present with a second primary cancer contralaterally," Maktabi added.

The researchers used the Surveillance Epidemiology and End Results Registry 9 data to evaluate breast cancer incidence among 415,664 white women and 39,887 black women diagnosed with primary breast cancer at age 19 or older and possible development of a second cancer in the opposite breast.

Results showed that 22,290 (40.7 percent) developed a second primary breast cancer, of which 18,142 (4 percent) occurred in the opposite breast. Incidence of second primary cancers of the opposite breast was higher among black women, and 15,101 (83.2 percent) of second contralateral cancers developed in those who were diagnosed with first breast cancer at age 45 or older.

In addition, contralateral breast cancer tended to occur within the first two years of the primary breast cancer diagnosis.

"This should alert the physician to watch patients very carefully," Maktabi said. "A cancer in one breast should lead to a careful of examination of the other breast over a long period, just in case a cancer develops."

Additionally, average age of the second primary contralateral cancer diagnosis tended to be lower in blacks (59 years of age) than in whites (67 years of age).


Story Source:

The above story is based on materials provided by American Association for Cancer Research. Note: Materials may be edited for content and length.


Cite This Page:

American Association for Cancer Research. "Higher incidence of secondary breast cancer seen among black women regardless of age." ScienceDaily. ScienceDaily, 19 September 2011. <www.sciencedaily.com/releases/2011/09/110919131605.htm>.
American Association for Cancer Research. (2011, September 19). Higher incidence of secondary breast cancer seen among black women regardless of age. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/2011/09/110919131605.htm
American Association for Cancer Research. "Higher incidence of secondary breast cancer seen among black women regardless of age." ScienceDaily. www.sciencedaily.com/releases/2011/09/110919131605.htm (accessed July 23, 2014).

Share This




More Health & Medicine News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Courts Conflicted Over Healthcare Law

Courts Conflicted Over Healthcare Law

AP (July 22, 2014) Two federal appeals courts issued conflicting rulings Tuesday on the legality of the federally-run healthcare exchange that operates in 36 states. (July 22) Video provided by AP
Powered by NewsLook.com
Why Do People Believe We Only Use 10 Percent Of Our Brains?

Why Do People Believe We Only Use 10 Percent Of Our Brains?

Newsy (July 22, 2014) The new sci-fi thriller "Lucy" is making people question whether we really use all our brainpower. But, as scientists have insisted for years, we do. Video provided by Newsy
Powered by NewsLook.com
Scientists Find New Way To Make Human Platelets

Scientists Find New Way To Make Human Platelets

Newsy (July 22, 2014) Boston scientists have discovered a new way to create fully functioning human platelets using a bioreactor and human stem cells. Video provided by Newsy
Powered by NewsLook.com
Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

TheStreet (July 21, 2014) New research shows Gilead Science's drug Sovaldi helps in curing hepatitis C in those who suffer from HIV. In a medical study, the combination of Gilead's Hep C drug with anti-viral drug Ribavirin cured 76% of HIV-positive patients suffering from the most common hepatitis C strain. Hepatitis C and related complications have been a top cause of death in HIV-positive patients. Typical medication used to treat the disease, including interferon proteins, tended to react badly with HIV drugs. However, Sovaldi's %1,000-a-pill price tag could limit the number of patients able to access the treatment. TheStreet's Keris Lahiff reports from New York. Video provided by TheStreet
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins