| Benign lesions (N = 41) | Malignant lesions (N = 116) | P value | ||
---|---|---|---|---|---|
Mean age (years) | 42.1 ± 11.6 (19–64) | 50.7 ± 11.8 (26–76) | <0.001* | ||
Menstruation state | Â | Â | <0.001* | ||
Premenopausal | 26 (63%) | 38 (33%) | Â | ||
Postmenopausal | 15 (37%) | 78 (67%) | Â | ||
Side | Â | Â | 0.640 | ||
Left | 24 (59%) | 63 (54%) | Â | ||
Right | 17 (41%) | 53 (46%) | Â | ||
Mean diameter (mm) | 22.1 ± 17.1 (11.0-100.0) | 26.0 ± 9.1 (10.0–60.0) | <0.001* | ||
Histologic result (no.) | Fibroadenoma | 21 (51%) | Invasive ductal carcinoma | 96 (83%) | Â |
 | Adenoses | 10 (24%) | Ductal carcinoma in situ | 12 (10%) |  |
 | Intraductal papilloma | 5 (12%) | Invasive micropapillary carcinoma | 4 (3%) |  |
 | Benign phyllodes tumor | 3 (7%) | Invasive lobular carcinoma | 2 (2%) |  |
 | Granulomatous mastitis | 1 (3%) | Invasive cribriform carcinoma | 1 (1%) |  |
 | Usual ductal hyperplasia | 1 (3%) | Carcinomas with medullary feature | 1 (1%) |  |
Shape | Â | Â | <0.001* | ||
Round | 23 (56%) | 10 (8%) | Â | ||
Oval | 12 (29%) | 3 (3%) | Â | ||
Irregular | 6 (15%) | 103 (89%) | Â | ||
Enhancement | Â | Â | <0.001* | ||
Homogeneous | 30 (73%) | 22 (19%) | Â | ||
Heterogeneous | 8 (20%) | 90 (78%) | Â | ||
Rim | 3 (7%) | 4 (3%) | Â |