Figures have suggested that breast cancer is typically diagnosed later in black women than white women.
During 2012 and 2013, analysis from Cancer Research UK and Public Health England showed that 25% of black African women and 22% of black Caribbean women have the disease detected at stage three or four.
However, only 13% of white women have the cancer diagnosed at this stage.
It is not yet clear why this is the case, however Cancer Research UK believe a range of factors are responsible, including awareness of symptoms, tumour biology and popular attitudes to cancer and breast screenings.
Public Health England's lead cancer doctor Jem Rashbass said: "This analysis will help improve awareness and target treatments.
"It also shows how vital it is that we collect data is on every person with cancer in England."
Doctor Julie Sharp, of Cancer Research UK, added: "Reducing late-stage diagnosis of cancer is a key part of our work to achieve better results for patients, and we want to be sure that any activity is reaching those most in need.
"Because of the data gaps, we'll need further work to know how accurate the picture is that these results paint."