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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

From: Efficacy of breast MRI for surgical decision in patients with breast cancer: ductal carcinoma in situ versus 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
  1. MRI Magnetic resonance imaging