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Evaluation of an MRI/US fusion technique for the detection of non-mass enhancement of breast lesions detected by MRI yet occult on conventional B-mode second-look US

  • Original Article–Breast & Thyroid
  • Published:
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Abstract

Purpose

The aim of this study was to verify the utility of second-look ultrasound (US) using real-time virtual sonography (RVS), a magnetic resonance imaging (MRI)/US fusion technique, in identifying MRI-detected breast lesions with non-mass enhancement (NME).

Methods

Consecutive patients who had one or more NME lesions detected by MRI yet occult on the subsequent second-look US in conventional B (cB)-mode imaging were enrolled in the study between June 2015 and April 2020. Supine MRI of the lesions was performed and, using its data, second-look US using RVS was performed.

Results

Twenty patients with 21 NME lesions were included. The overall median lesion size on prone MRI was 23 mm (range, 5–63 mm). Supine MRI identified all the 21 NME lesions, and second-look US using RVS successfully detected 18 (86%) of them. RVS-guided biopsy was performed for histopathological evaluation, showing that nine of the 18 lesions were benign and the other nine malignant. Of the nine malignant lesions, two (22%) were invasive cancer and seven (78%) were ductal carcinoma in situ. In four of five patients who underwent prone MRI for preoperative evaluation, the diagnosis was benign and surgery was conducted as originally planned. In the other patient, the diagnosis was malignant and contralateral breast-conserving surgery was added. Three (14%) of the 21 NME lesions had no RVS correlates and were judged to be benign after 24-month follow-up.

Conclusion

The results suggest that second-look US using RVS helps identify MRI-detected NME lesions that are occult on cB-mode second-look US.

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Acknowledgements

We thank Yukiko Kuru (Faculty of Foreign Languages, Aichi Medical University School of Medicine) for the English editing. We also thank Wataru Oohashi (Division of Biostatistics, Clinical Research Center, Aichi Medical University Hospital) for the statistical analysis.

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Correspondence to Shogo Nakano.

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The authors have no conflicts of interest to declare.

Ethical statements

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions.

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Informed consent was obtained from all patients for being included in the study.

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Goto, M., Nakano, S., Saito, M. et al. Evaluation of an MRI/US fusion technique for the detection of non-mass enhancement of breast lesions detected by MRI yet occult on conventional B-mode second-look US. J Med Ultrasonics 49, 269–278 (2022). https://doi.org/10.1007/s10396-021-01175-2

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  • DOI: https://doi.org/10.1007/s10396-021-01175-2

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