False negative for mammography resolved by tomosynthesis

This woman had her regular screening mammogram, which was rated as BI-RADS 1, or normal.

Some weeks later she returned because of a palpable lump in her breast. Ultrasound detected this lump and was determined through biopsy to be DCIS. Her mammogram was retrospectively reviewed and the cancer was deemed to be mammographically occult.

On review of the tomosynthesis image, taken at the same time as the mammogram, the cancer can be clearly seen near the skin line above the nipple.

This image is from a technology that is a work-in-progress and that does not have regulatory approval in certain global markets.