Table 1.
Characteristics of the study subjects.
Table 2.
Sonographic features with explanations.
Table 3.
The patients’ clinical pathological characteristics in the two groups.
Table 4.
The result of chi-squared test of the ultrasound features by groups.
Table 5.
The result of the multivariate logistical regression analysis.
Fig 1.
The maximum diameter of the tumor and lateral acoustic shadow feature on ultrasound.
a. The maximum diameter of the normal-like breast cancer is 14 mm, and the lateral acoustic shadow is shown. b. The maximum diameter of the basal-like breast cancer is 30 mm. There is no lateral acoustic shadow.
Fig 2.
The tumor margin on ultrasound.
a. It shows that there is a slight lobulated margin of normal-like breast tumor. b. The ultrasound image of a basal-like breast cancer shows that the tumor margin is angular and speculated.
Fig 3.
The relationship between lateral acoustic shadow feature on ultrasound and molecular subtypes of breast cancer.
a. The ultrasound image of a tumor with lateral acoustic shadow is classified as the normal-like subtype according to the immunohistochemistry results. b. The ultrasound image of a tumor without lateral acoustic shadow is classified as the basal-like subtype according to the immunohistochemistry results.
Fig 4.
The echo pattern of the breast tumor with TNBC subtype.
We observed the marked hypoechoicity in the tumor, and all three markers including ER, PR, and HER2 are negative.