Breast MRI biopsy cancellation due to lesion nonvisualization.

It is a clinical dilemma when a finding reported as suspicious on a breast MRI is not visualized at the time of a scheduled MRI-guided breast biopsy. We retrospectively reviewed all canceled MRI-guided biopsies at our institution between 6/1/2009 and 9/20/2019 and found a cancellation rate of 6.9% (72/1051). In one case, a mastectomy was performed after the canceled biopsy revealing a focus of DCIS in the same quadrant as the original finding (malignancy rate 2.1%). Our results support the current practice of 6-month follow-up MRI recommendation after a canceled MRI-guided biopsy for lesion nonvisualization.