From: Breast cancer diagnosed before the 40 years: imaging findings and correlation with histology and molecular subtype
Molecular subtypes
Mass shape at ultrasound
Luminal A (n = 14)
Luminal B (n = 48)
HER 2 (n = 10)
Triple-negative (n = 23)
Round or oval
6(42.9)
10(22.2)
4(40.0)
16(69.6)
Irregular
8(57.1)
35(77.8)
6(60.0)
7(30,4)