Management of Non-Mass Enhancement on Breast MRI: Diagnostic Challenges and Clinical Strategies
Main Article Content
Abstract
Non-mass enhancement (NME) on breast magnetic resonance
imaging (MRI) is a diagnostically challenging entity that can be easily
confused with background parenchymal enhancement and physiological
changes. This article provides an overview of the concept, imaging
features, and diagnostic challenges of NME according to BI-RADS, while
also analyzing clinical management strategies based on multimodality
correlation and histopathological results. Sources include the American
College of Radiology Breast Imaging Reporting and Data System (ACR
BI-RADS, 5th edition, 2013), recent international studies, and illustrative
clinical cases from local practice. The article highlights the role of risk
stratification (BI-RADS 3, 4a, 4b), indications for MRI-guided biopsy
versus alternative modalities such as ultrasound and mammography,
as well as the value of short-term follow-up in reducing unnecessary
biopsies. Future research prospects focus on refining grading criteria for
NME and standardizing MRI-guided biopsy protocols. In conclusion, the
management of NME requires a comprehensive approach, taking into
account clinical context and individual risk factors to optimize diagnostic
accuracy and treatment outcomes.
Article Details
References
2. Background Parenchymal Enhancement on Breast MRI: A Comprehensive Review - PMC. Accessed September 15, 2025. https://pmc.ncbi.nlm.nih.gov/articles/PMC7207072/
3. ACR BI-RADS Atlas 5th Edition Accessed September 15, 2025.
4. Niketa C, Pang KA, Lim JW. Challenges in MRI-Guided Breast Biopsy and Some Suggested Strategies: Case Based Review. Diagnostics (Basel). 2022;12(8):1985. doi:10.3390/diagnostics12081985
5. Kubota K, Mori M, Fujioka T, Watanabe K, Ito Y. Magnetic resonance imaging diagnosis of non-mass enhancement of the breast. J Med Ultrason (2001). 2023;50(3):361-366. doi:10.1007/s10396-023-01290-2
6. De Faria Castro Fleury E, Castro C, do Amaral MSC, Roveda Junior D. Management of Non-Mass Enhancement at Breast Magnetic Resonance in Screening Settings Referred for Magnetic Resonance-Guided Biopsy. Breast Cancer (Auckl). 2022;16:11782234221095897. doi:10.1177/11782234221095897
7. Lunkiewicz M, Forte S, Freiwald B, Singer G, Leo C, Kubik-Huch RA. Interobserver variability and likelihood of malignancy for fifth edition BI-RADS MRI descriptors in non-mass breast lesions. Eur Radiol. 2020;30(1):77-86.doi:10.1007/s00330-019-06312-7
8. Background Parenchymal Enhancement at Breast MR Imaging: Normal Patterns, Diagnostic Challenges, and Potential for False-Positive and False-Negative Interpretation | RadioGraphics. Accessed September 15, 2025.https://pubs.rsna.org/doi/abs/10.1148/rg.341135034
9. Arslan G, Çelik L, Çubuk R, Çelik L, Atasoy MM. Background parenchymal enhancement: is it just an innocent effect of estrogen on the breast? Diagn Interv Radiol. 2017;23(6):414-419. doi:10.5152/dir.2017.17048
10. Nonmass Enhancement on Breast MRI: Review of Patterns With Radiologic-Pathologic Correlation and Discussion of Management | AJR. Accessed September 15, 2025. https://ajronline.org/doi/10.2214/AJR.14.12656
11. Revisiting Nonmass Enhancement in Breast MRI: Analysis of Outcomes and Follow-Up Using the Updated BIRADS Atlas | AJR. Accessed May 30, 2025. https://ajronline.org/doi/10.2214/AJR.17.18086#tab1
12. MRI-Guided Percutaneous Biopsy of Breast Lesions: Materials, Techniques, Success Rates, and Management in Patients with Suspected Radiologic-Pathologic Mismatch. Accessed September 15, 2025.
13. Perić I, Brkljačić B, Tadić T, et al. DWI in the Differentiation of Malignant and Benign Breast Lesions Presenting with Non-Mass Enhancement on CE-MRI. Cancers. 2025;17(1):31. doi:10.3390/cancers17010031
14. Liu G, Li Y, Chen SL, Chen Q. Non-mass enhancement breast lesions: MRI findings and associations with malignancy. Annals of Translational Medicine. 2022;10(6):357-357. doi:10.21037/atm-22-503
15. Limited role of DWI with apparent diffusion coefficient mapping in breast lesions presenting as non-mass enhancement on dynamic contrast-enhanced MRI | Breast Cancer Research | Full Text. Accessed September 20,2025. https://breast-cancer-research.biomedcentral.com/articles/10.1186/s13058-019-1208-y?