Late-stage disease is found in about 25% of black African and 22% of black Caribbean breast cancer patients.
In white breast cancer patients, the figure is 13%.
Experts say there are many reasons for this. Vital ones to change are low awareness of symptoms and screening.
According to Cancer Research UK, black women are less likely than white women to go for a mammogram when invited by the NHS.
Spotting cancer early is important because the sooner it can be treated, the better the outcome.
