Table 3.

Ultrasound imaging features in 144 patients with TNBC by AR status

	AR+ (n=45)	AR− (n=99)
Imaging feature	N (%)	N (%)
Mass shape
Irregular	23 (51)	25 (25)
Oval	22 (49)	73 (74)
Round	0 (0)	1 (1)
Mass margin
Angular	2 (4)	2 (2)
Circumscribed	3 (7)	12 (12)
Indistinct	17 (38)	27 (27)
Microlobulated	21 (47)	55 (56)
Spiculated	2 (4)	3 (3)
Mass echo pattern
Complex cystic and solid	9 (20)	24 (24)
Heterogeneous	14 (31)	24 (24)
Hypoechoic	22 (49)	51 (52)
Mass orientation
Not parallel	10 (22)	16 (16)
Parallel	35 (78)	83 (84)
Vascularity
Absent	15 (33)	28 (28)
Internal vascularity	24 (53)	55 (56)
Vessels in rim	6 (13)	16 (16)