The following resources provide information about health disparities in cancer.
General information about health disparities in cancer
Centers for Disease Control and Prevention: Health Disparities in Cancer 
National Cancer Institute: Center to Reduce Cancer Health Disparities 
Specific resources that provide services for underserved people
Nueva Vida, Inc. 
U.S. Department of Health and Human Services: Office of Minority Health 
Sisters Network, Inc.  (for African American breast cancer survivors)