Magnetic Resonance Imaging Assessment of Radial scars/complex Sclerosing Lesions of the Breast
Purpose: To describe the magnetic resonance characteristics of radial scars/complex sclerosing lesions
(RS/CSL) of the breast using the current BI-RADS lexicon. To investigate the value of diffusion weighted imaging to
Patients and methods: From 2010 to 2017 we have found 25 women with architectural distortion at mammography who
underwent surgical resection with a final hystopathologic report of RS/CSL. For description of MRI findings we adhered
to BI-RADS classification (5th edition).
Results: The final pathological diagnosis was: “pure” RS/CSL in 7 cases (28%), RS/CSL with associated high risk lesions
in 12 (48%) and 6 cases (24%) were associated with malignancy. Magnetic resonance findings: four of 25 negative or
focus. Five of 25 mass enhancement: irregular, non circumscribed spiculated mass with heterogeneous or rim
enhancement and most with type II curves. Sixteen of 25 non mass enhancement: focal or linear distribution and
heterogeneous internal enhancement most with type I curves. Six of 25 had cancer associated with the complex sclerosing
lesion. All six showed non-mass, focal and clustering-ring enhancement. Two cases with invasive breast carcinoma had
ADC values under 1.15 x10−3 mm/s while most of the rest had values above.
Conclusion: Most RS/CSL showed enhancement at MR. The predominant pattern was a non-mass, focal, heterogeneous
internal enhancement with type 1 curves. All cases with associated cancer showed non mass enhancement. Invasive breast
cancers had ADC values < 1.15 10-3 s/mm2.
Journal Title: Current Medical Imaging