Breast MRI (magnetic resonance imaging) is a test that should not be used to distinguish between benign (noncancerous) and malignant (cancerous) areas, in lieu of a breast biopsy. Due to false positive results, performing this test may increase the number of breastbiopsies that need to be performed. It is not appropriate to utilize breast MRI to evaluate a suspicious breast mass, or to follow these breast masses over time. Although MRI may detect tumors in dense breast tissue, the presence of dense breast tissue is not a reason to have a breast MRI scan. Breast MRI scanning cannot detect tiny specks of calcium (known as microcalcifications), which account for half of the cancers detected by mammography.
Talk to your doctor about whether you should have an MRI of the breasts.
By Amy Engeler
On September 2 of last year, Tomomi Arikawa left her office door open as she slipped out to her two o'clock sonogram appointment. She expected to return shortly — the imaging center was just across town from her office at ABC News, where she was a story editor for 20/20. At her gynecologist's urging, Tomomi was going to have a tender lump in her right breast checked out. The lump felt squishy, like a piece of Bubble Wrap, not like a hard kernel or a marble or any of the objects tumors...