Table 3 Additional pathological results excluding the main lesion for cases with changes in the surgical plans based on MRI findings
Additional pathological results (n, %) | Ductal carcinoma in situ (n = 32) | Invasive ductal carcinoma (n = 88) | P value |
|---|---|---|---|
Larger tumor size observed on breast MRI vs. breast mammography or ultrasonography | 14 (43.8) | 49 (55.7) | 0.784 |
True malignancy | 9 (28.1) | 32 (36.3) | |
Background of ductal carcinoma in situ (> 5 cm) | – | 27 (30.7) | |
Benign pathologic findings | 5 (15.6) | 17 (19.3) | |
Multiple lymphovascular invasion | – | 6 (6.8) | |
Extensive intraductal component | – | 9 (10.2) | |
Multifocality | 12 (37.5) | 20 (22.7) | 0.139 |
Separate nodules with invasive and non-invasive focus | – | 3 (3.4) | |
Microcalcification, both in tumor and benign ducts | 6 (18.8) | 18 (20.5) | 0.950 |
Microcalcification, only in benign ducts | – | 7 (8.0) | |
Sclerosing adenosis or fibroadenoma | 4 (12.5) | 2 (2.3) | 0.061 |