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PB.27. Breast screening with MRI in high-risk women

Introduction

This study evaluates the use of annual breast MRI surveillance for high-risk women, evaluating the recall rate for further imaging, biopsy and cancer detection rate. We have used breast MRI for surveillance of high-risk women since 2008.

Methods

High-risk women identified by the Regional Genetic Service between 2008 and 2013 underwent annual breast MRI (1.5 T), in some cases in conjunction with digital mammography. This included those with a genetic predisposition of breast cancer (TP53, BRCA-1, BRCA-2) or equivalent high risk and previous thoracic radiotherapy. Women were offered MRI screening between the ages of 20 and 50.

Results

Over 6 years, 184 women underwent 477 screening MRIs. There were 44 lesions recalled for second-look ultrasound in 39 women. Twenty-seven lesions had a core biopsy, from which 10 malignant lesions were identified. Nine of these were invasive ductal carcinoma, of which all were either grade 2 or 3, varying in size from 4 to 34 mm. One case of ductal carcinoma in situ was identified. The remaining 17 lesions were benign. Women who had a normal ultrasound either had an interval MRI after 6 months or were returned to routine yearly screen.

Conclusions

MRI screening of high-risk women is effective, with a cancer detection rate of 2.1% and a recall rate of 9.2% which are within the standards set by UK national guidelines. There has been one false negative screen to date. Breast MRI screening provides a viable alternative to prophylactic mastectomy for women at high risk of breast cancer.

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Correspondence to D Howarth.

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Howarth, D., Gilmour, J., Sibal, N. et al. PB.27. Breast screening with MRI in high-risk women. Breast Cancer Res 16, P17 (2014). https://doi.org/10.1186/bcr3712

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Keywords

  • Ductal Carcinoma
  • Invasive Ductal Carcinoma
  • Recall Rate
  • Digital Mammography
  • Prophylactic Mastectomy