[MR breast screening in patients with genetic mutation]
E Daguet1, C Malhaire, C Hardit
1Service de Radiologie, Institut Curie, Paris Cedex 05, France.
Journal De Radiologie
|July 22, 2008
Summary
Magnetic resonance imaging (MRI) significantly improves breast cancer detection in high-risk patients with genetic mutations compared to conventional screening. This enhanced screening tool offers higher sensitivity for identifying cancers earlier.
Area of Science:
- Oncology
- Radiology
- Genetics
Background:
- High-risk patients with genetic mutations require intensive breast cancer screening.
- Conventional methods like mammography and ultrasound have limitations in sensitivity and specificity for this population.
Purpose of the Study:
- To compare the efficacy of screening breast MRI against conventional screening techniques.
- To evaluate MRI's performance in detecting breast cancer in high-risk individuals with known genetic mutations.
Main Methods:
- A prospective study involving 85 high-risk patients with genetic mutations.
- Comparison of screening breast MRI with mammography and ultrasound over a mean of 2.7 years.
- Biopsies were performed for BI-RADS lesions 3-5; isolated BI-RADS 3 lesions on MRI were followed.
Main Results:
- Breast MRI demonstrated a sensitivity of 95% compared to 12.5% for mammography and 50% for ultrasound.
- MRI specificity was 94.8%, with mammography at 98.7% and ultrasound at 97.3%.
- Eight cancers were diagnosed, including an interval cancer, with MRI-guided biopsies showing a positive predictive value of 58%.
Conclusions:
- Screening breast MRI is a valuable tool for high-risk patients with genetic mutations.
- MRI significantly enhances cancer detection rates in this population, complementing conventional screening methods.
