Mammogram — Comprehensive overview covers definition, risks, what to expect, and results of this breast X-ray test used in breast cancer diagnosis.

Mammograms have long been used to screen for breast cancer. Find out about Mayo Clinic's mammogram guidelines.

Overview. The Mayo Day Clinic which is housed in Mayo No. 2, was the vision of its creator, Dr Wypke Wypkema. It opened in 1974 as part of the Mayo Clinic "one-stop medical and diagnostic centre" and began with one operating theatre and 20 beds.