Table 1.
Patient demographics (N=331) and lesion characteristics (N=512).
| Characteristic | Value | ||
| Age (years) | |||
|
|
Mean (SD) | 43.88 (12.10) | |
|
|
Median (range) | 45 (17-70) | |
| Age distribution (years), n (%) | |||
|
|
<30 | 39 (11.8) | |
|
|
30-39 | 76 (23.0) | |
|
|
40-49 | 104 (31.4) | |
|
|
50-59 | 80 (24.2) | |
|
|
60-70 | 32 (9.7) | |
| Lesion size (cm)a | |||
|
|
Mean (SD) | 1.85 (1.19) | |
|
|
Median (range) | 1.7 (0.26-9.50) | |
| Malignant lesion size (cm) | |||
|
|
Mean (SD) | 2.28 (1.10) | |
|
|
Median (range) | 2.18 (0.26-6.20) | |
| Benign lesion size (cm) | |||
|
|
Mean (SD) | 1.82 (1.39) | |
|
|
Median (range) | 1.41 (0.37-9.50) | |
| Pathological finding, n (%) | |||
|
|
Malignant | 200 (39.1) | |
|
|
Benign | 312 (60.9) | |
| Histological type, n (%) | |||
|
|
Malignant (n=200) | ||
|
|
Intraductal carcinoma in situ | 9 (4.5) | |
|
|
Invasive lobular carcinoma | 17 (8.5) | |
|
|
Mucinous adenocarcinoma | 4 (2.0) | |
|
|
Medullary carcinoma | 3 (1.5) | |
|
|
Invasive ductal carcinoma | 167 (83.5) | |
|
|
Benign (n=312) | ||
|
|
Intraductal papilloma | 37 (11.9) | |
|
|
Granulomatous mastitis | 8 (2.6) | |
|
|
Fibroma | 211 (67.6) | |
|
|
Hyperplasia-induced lesions | 5 (17.31) | |
|
|
Scar tissue | 2 (0.6) | |
acm: centimeters.