Dr. Mark Guilfoyle practiced at the Dartmouth-Hitchcock Medical Center in Lebanon, NH. He missed 24 breast cancer diagnoses over three -- errors that led to mastectomies and radiation treatment that may have been avoidable. Complaints to the New Hampshire Board of Medicine did not receive response for eight months, the Globe reported.

In 2020, 11 of the two dozen women whose cancers Guilfoyle missed settled malpractice claims and received $4.6 million payout, the Globe report said.

According to a Board decision, Guilfoyle may not read mammograms in the state of New Hampshire, but he can still read x-rays there.