Table 2.
Characteristics of patients diagnosed with contralateral ductal carcinoma in situ (DCIS) after primary DCIS by MRI use and moment of detection
| MRI group | MRI group | Age-matched controls | ||||
|---|---|---|---|---|---|---|
| Synchronous (n = 12) |
Metachronous (n = 28) |
p value$ | Total (n = 40) |
Total (n = 24) |
p value† | |
| Age at diagnosis, median (IQR), years | 51 (40–56) | 50 (46–58) | 0.61 | 51 (45–57) | 53 (49–66) | 0.03 |
| Grade, n (%) | 0.06 | 0.48 | ||||
| Low | 4 (36%) | 4 (15%) | 8 (22%) | 8 (35%) | ||
| Intermediate | 6 (55%) | 10 (39%) | 16 (43%) | 7 (30%) | ||
| High | 1 (9%) | 12 (46%) | 13 (35%) | 8 (35%) | ||
| Unknown | n = 1 | n = 2 | n = 3 | n = 1 | ||
| Surgery, n (%) | 11 (92%) | 26 (93%) | 1.00 | 37 (93%) | 23 (96%) | 0.52 |
| BCS | 1 (8%) | 13 (46%) | 14 (35%) | 12 (50%) | ||
| Mastectomy | 10 (83%) | 13 (46%) | 0.04 | 23 (58%) | 11 (46%) | 0.21 |
| None | 1 (8%) | 2 (7%) | 3 (8%) | 1 (4%) | ||
| Radiotherapy, n (%) | 1 (8%) | 9 (32%) | 0.23 | 10 (25%) | 6 (25%) | 1.00 |
BCS breast-conserving surgery, IQR interquartile range
$Comparison of synchronous with metachronous DCIS in the MRI group
†Comparison of all contralateral DCIS in the MRI group versus the age-matched controls