Bing found the following results
Breast cancer - Symptoms and causes - Mayo Clinic
Breast Cancer—Patient Version - NCI
Breast cancer - Diagnosis and treatment - Mayo Clinic
Breast Cancer | Breast Cancer Information & Overview
Breast cancer - World Health Organization (WHO)
What Is Breast Cancer? | American Cancer Society
Breastcancer.org - Breast Cancer Information and Support
What Is Breast Cancer? An Overview
Basic Information About Breast Cancer | CDC
If You Have Breast Cancer - American Cancer Society