Table 2.
Changes in the surgical scale and reasons for the changes in the surgical plans of patients with ductal carcinoma in situ and invasive ductal carcinoma
| Ductal carcinoma in situ (n = 199) |
Invasive ductal carcinoma (n = 914) |
P value | |
|---|---|---|---|
| Increased surgical scale (n, %) | 28 (14.0) | 81 (8.9) | 0.002 |
| Decreased surgical scale (n, %) | 4 (2.0) | 7 (0.8) | 0.035 |
| Total number of cases with surgical plan changes (n, %) | 38 (19.1) | 92 (10.1) | < 0.001 |
| Changes in surgical plans based on MRI findings (n, %) | 32 (16.1) | 88 (9.6) | < 0.001 |
| Reasons (n, %) | |||
| Increased extent of suspicious lesions on breast MRI | 18 (9.0) | 65 (7.1) | – |
| Additional lesions on breast MRI | 7 (3.5) | 13 (1.4) | – |
| Multifocality or multicentricity on breast MRI | 3 (1.5) | 3 (0.3) | – |
| Suspicious lesions on mammography or ultrasonography but benign lesions on breast MRI | 4 (2.0) | 7 (0.8) | – |
| Changes in surgical plans due to patient’s desire | 6 (3.0) | 4 (0.4) | – |
| Positive margin status in the initial frozen biopsy (Groups 1–3) | 13 (6.5) | 59 (6.5) | 0.470 |
| Positive results in nipple frozen method (Group 4) | 7 (3.5) | 15 (1.6) | 0.1301 |
MRI Magnetic resonance imaging