The Role of Preoperative Bilateral Breast Magnetic Resonance Imaging in Patient Selection for Partial Breast Irradiation in Ductal Carcinoma In Situ
Table 1
Characteristics of 117 women with DCIS eligible for partial breast irradiation on the basis of an initial clinical evaluation, and of the 23 women ultimately ineligible by MRI.
Variable
Overall ()
Ineligible based on MRI findings ()
No. (%)a
Age at diagnosis, y
31–40
3 (3%)
1 (4%)
41–50
20 (17%)
4 (17%)
51–60
31 (26%)
4 (17%)
61–70
25 (21%)
4 (17%)
71–80
30 (26%)
7 (30%)
81–91
8 (7%)
3 (13%)
Race
African American/Black
4 (3%)
1 (4%)
Asian
1 (1%)
0 (0%)
Caucasian
105 (90%)
21 (91%)
Hispanic
4 (3%)
1 (4%)
Other
3 (3%)
0 (0%)
Menopausal status
Post
89 (76%)
16 (70%)
Pre
28 (24%)
7 (30%)
No. of first degree relatives with history of breast cancer
0
85 (73%)
14 (61%)
1
23 (20%)
6 (26%)
2-3
8 (7%)
2 (9%)
Unknown/not available
1 (1%)
1 (4%)
No. of relatives with history of breast cancer
0
71 (61%)
13 (57%)
1
27 (23%)
5 (22%)
2–4
18 (15%)
4 (17%)
Unknown/Not available
1 (1%)
1 (4%)
Dense breasts
No
32 (27%)
8 (35%)
Yes
79 (68%)
14 (61%)
Not reported/indeterminate
6 (5%)
1 (4%)
Detection method
Mammogram
105 (90%)
19 (83%)
Palpation
10 (9%)
3 (13%)
Other
2 (2%)
1 (4%)
Lumpectomy
68 (58%)
4 (17%)
No. of days from diagnosis to MRI
14 (0, 9, 23, 95)
12 (4, 8, 22, 34)
No. of days from diagnosis to surgery
38 (6, 27, 56, 813)
36 (21, 27, 57, 813)
aSample median (minimum, 1st quartile, 3rd quartile, maximum) is given for numerical variables, whereas (%) is given for categorical variables.
