'Aggressive cancer' risk higher for black women - study
Black women are three times more likely than other women to develop
an aggressive form of breast cancer characterised by "triple negative
tumours", a study published found.
The findings, published in BioMed Central's open access journal
Breast Cancer Research, held true even when other risk factors such as
lifestyle, age and weight were taken into account.
In the United States, where the study was conducted, the overall
incidence of breast cancer is lower in black women than in white women.
But when black women do get breast cancer, it tends to be more
advanced when diagnosed, has a higher risk of recurring, and a less
favourable outcome.
Researchers led by Carol Rosenberg of Boston University analysed 415
breast cancer cases and noted the number of "triple negative" tumours,
so called because three critical proteins - estrogen and progesterone
receptors, and the HER2 gene - malfunction.
"The odds of having a triple-negative tumour were three times higher
for black women than for non-black women," said Rosenberg in a press
statement.
It had been known that pre-menopausal black women were
disproportionately affected by this deadly form of cancer, but the new
study showed that these tumours were just as common in black women
diagnosed before or after age 50, obese or not.
"The higher prevalence of triple negative breast tumours in black
women in all age and weight categories likely contributes to black
women's unfavourable breast cancer prognosis," Rosenberg said.
PARIS, AFP |