Breast cancer rising among Asian-American women

June 10, 2002

LOS ANGELES, June 10-Asian-American women have traditionally had a lower risk of breast cancer than others, but epidemiologists at the Keck School of Medicine of USC and USC/Norris Comprehensive Cancer Center have found that their breast cancer rates have been rising.

Cases of breast cancer among Japanese-American women, in particular, have been increasing rapidly, according to research published in the June 10 issue of the International Journal of Cancer.

The study is based on cancer cases reported in the mid-to-late 1990s to the Los Angeles Cancer Surveillance Program (CSP). The registry records cancers throughout Los Angeles County, the most populous and probably most ethnically diverse county in the nation. Breast cancer rates in Los Angeles are similar to rates nationwide.

Researchers found that the breast cancer incidence rates for Japanese and Filipino women were about double those for Chinese and Korean women, and rates rose during the 1993-1997 period for all except Chinese women.

"Although Asian-American women in the past have had low breast cancer rates, that appears to no longer be the case," says Dennis Deapen, professor of preventive medicine and director of the Los Angeles County CSP. "And if trends from the 1990?s have continued, rates among Japanese-American women in Los Angeles County may have surpassed those of non-Hispanic white women, who have historically had the highest rates of breast cancer."

The study indicated the following about breast cancer:

"Breast cancer incidence for Japanese-American women in Los Angeles County is the highest reported anywhere in the world," Deapen notes. In Japan itself, studies have shown that breast cancer incidence also has increased dramatically, more than doubling from 1960 to the late 1980s. The Japanese lifestyle has become increasingly Westernized, study authors note, influencing factors known to increase risk for breast cancer: having fewer children, engaging in less physical activity and experiencing increasing obesity. Japanese are also eating more fats and fewer soy products.

Research has shown that when Asian women migrate to the United States, breast cancer risk increases in subsequent generations. Among the four Asian groups analyzed in this study, Japanese were the first population to migrate to Los Angeles County in substantial numbers, followed by Filipinos. Chinese and Koreans tend to be more recent and less acculturated immigrant populations.

Deapen and colleagues note that the trends point out the need for increasing awareness of breast cancer as a significant health hazard among Asian-American women, especially those of Japanese descent. Although Asian-American women have traditionally had lower-than-average breast cancer risk, physicians need to know that is no longer true?and breast cancer screening among such women is just as important as it is in other groups.

Adds Deapen: "The rapid increase in cancer rates also suggests that outside factors?such as diet and exercise?are prominent in risk, and these factors can potentially be altered."
Dennis Deapen, Lihua Liu, Carin Perkins, Leslie Bernstein and Ronald K. Ross. "Rapidly Rising Breast Cancer Incidence Rates Among Asian-American Women." International Journal of Cancer, June 10, 2002.

University of Southern California

Related Breast Cancer Articles from Brightsurf:

Oncotarget: IGF2 expression in breast cancer tumors and in breast cancer cells
The Oncotarget authors propose that methylation of DVDMR represents a novel epigenetic biomarker that determines the levels of IGF2 protein expression in breast cancer.

Breast cancer: AI predicts which pre-malignant breast lesions will progress to advanced cancer
New research at Case Western Reserve University in Cleveland, Ohio, could help better determine which patients diagnosed with the pre-malignant breast cancer commonly as stage 0 are likely to progress to invasive breast cancer and therefore might benefit from additional therapy over and above surgery alone.

Partial breast irradiation effective treatment option for low-risk breast cancer
Partial breast irradiation produces similar long-term survival rates and risk for recurrence compared with whole breast irradiation for many women with low-risk, early stage breast cancer, according to new clinical data from a national clinical trial involving researchers from The Ohio State University Comprehensive Cancer Center - Arthur G.

Breast screening linked to 60 per cent lower risk of breast cancer death in first 10 years
Women who take part in breast screening have a significantly greater benefit from treatments than those who are not screened, according to a study of more than 50,000 women.

More clues revealed in link between normal breast changes and invasive breast cancer
A research team, led by investigators from Georgetown Lombardi Comprehensive Cancer Center, details how a natural and dramatic process -- changes in mammary glands to accommodate breastfeeding -- uses a molecular process believed to contribute to survival of pre-malignant breast cells.

Breast tissue tumor suppressor PTEN: A potential Achilles heel for breast cancer cells
A highly collaborative team of researchers at the Medical University of South Carolina and Ohio State University report in Nature Communications that they have identified a novel pathway for connective tissue PTEN in breast cancer cell response to radiotherapy.

Computers equal radiologists in assessing breast density and associated breast cancer risk
Automated breast-density evaluation was just as accurate in predicting women's risk of breast cancer, found and not found by mammography, as subjective evaluation done by radiologists, in a study led by researchers at UC San Francisco and Mayo Clinic.

Blood test can effectively rule out breast cancer, regardless of breast density
A new study published in PLOS ONE demonstrates that Videssa® Breast, a multi-protein biomarker blood test for breast cancer, is unaffected by breast density and can reliably rule out breast cancer in women with both dense and non-dense breast tissue.

Study shows influence of surgeons on likelihood of removal of healthy breast after breast cancer dia
Attending surgeons can have a strong influence on whether a patient undergoes contralateral prophylactic mastectomy after a diagnosis of breast cancer, according to a study published by JAMA Surgery.

Young breast cancer patients undergoing breast conserving surgery see improved prognosis
A new analysis indicates that breast cancer prognoses have improved over time in young women treated with breast conserving surgery.

Read More: Breast Cancer News and Breast Cancer Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to