When is breast MRI most indicated?

• A. To assess implant rupture
• B. For routine screening in average-risk patients
• C. To evaluate suspicious calcifications on mammography
• D. For routine follow-up after lumpectomy

Answer: (A)

Breast MRI is the most accurate method for evaluating implant integrity and detecting rupture because it provides exceptional soft-tissue contrast and uses silicone-specific imaging sequences that clearly show where silicone is or isn’t contained. It can identify both intracapsular rupture (silicone still within the capsule) and extracapsular rupture (silicone leaking into surrounding tissue), with characteristic findings that are easily seen on MRI. This makes MRI the preferred test when rupture is suspected or when accurate assessment will change management, such as planning for implant revision.

It’s not used for routine screening in average-risk patients due to cost and the potential for false positives. Evaluating suspicious calcifications on mammography is best done with mammography itself and targeted imaging or biopsy rather than MRI. Routine follow-up after lumpectomy is generally handled with mammography and ultrasound; MRI may be reserved for problem-solving scenarios or certain high-risk situations, not for standard post-lumpectomy surveillance.