Table 1.

Patient and tumor characteristics of 362 breast cancer patients recruited between 2015 and 2019 for the analysis of the efficacy of cSR-guided re-excisions in breast-conserving surgery after neoadjuvant chemotherapy

Number of patients	(n = 362) (Percentages in brackets)
Age
Median	54
Interquartile	46; 61
Range of 25 and 75 percentile race/ethnicity	Not systematically assessed, mostly European
Menopausal status
Premenopausal  Perimenopausal  Postmenopausal	117 (32.3) 55 (15.2) 190 (52.5)
Breast density
(ACR)
A	32 (8.8)
B	161 (44.5)
C	108 (29.8)
D	19 (5.2)
Histological tumor type
Invasive-ductal (NST)	348 (96.1)
Invasive-lobular	8 (2.2)
Invasive-medullary	1 (0.3)
Invasive-mucinous	1 (0.3)
Missing data	4 (1.1)
Grading
G1	4 (1.1)
G2	137 (37.8)
G3	218 (60.2)
Missing data	3 (0.8)
Target structure for lesion marking  Clip marker	354 (97.8)
Microcalcifications	100 (27.6)
Radiographic presentation of the tumor
Only mass	253 (69.9)
Mass with microcalcifications	100 (27.6)
Only microcalcifications	4 (1.1)
Undefined	5 (1.3)
MRI performed
Before and after NACT	25 (6.9)
Only before NACT	75 (26.2)
Only after NACT	35 (9.7)
Not performed	227 (62.7)
Remission status
cCR	167 (46.1)
With pCR (% of cCR patients)	102 (61.1)
Non-cCR	195 (53.9)
With pCR (% of non-cCR patients)	48 (24.6)
Final T-category (ypT)
0  is  1  −1mic  −1a  −1b  −1c  2  3  4	151 (41.7) 19 (5.2) 5 (1.4) 47 (13.0) 43 (11.8) 61 (16.9) 34 (9.4) 2 (0.6) 0 0
Median specimen weight (grams) Primary resection re-Resection	30.0 (interquartile range: 20;49) 6.0 (interquartile range: 3; 14)
Histologically Infiltrated margins by orientation
Total	102 (4.7)
Medial	21 (20.6)
Lateral	17 (16.7)
Kranial	29 (28.4)
Kaudal	10 (9.8)
Ventral	11 (10.8)
Dorsal	14 (13.7)

cCR clinical complete response, pCR pathological complete response