The New York Times has a great interactive visualization of the widening racial disparity in breast cancer deaths drawn from data from the Cancer Institute. Previously, black women had lower breast cancer mortality than whites, but it is now higher. The trend is not exactly the same across all states.
The New York Times article was inspired by a publication based on the trend in racial disparities in cancer mortality in the 25-largest cities in the US:
The racial disparity in breast cancer mortality in the 25 largest cities in the United States
Steven Whitman, Jennifer Orsi and Marc Hurlbert | Cancer Epidemiology
Relevant to this topic is a link to the latest Health Disparities, 2013 report from CDC.