Fig. 2

Ultrasonography of the left breast. The C region of the left breast contained an irregularly shaped, poorly echoic region. Large- and small-sized irregularities were observed over a wide range that excluded the B region. The mammary gland tissues clearly differed in both properties and thickness between the left and right sides. A poor blood flow signal was observed on Doppler ultrasonography. Swelling and thickness were observed in several axillary lymph nodes; however, the cortical echo level was low and internal heterogeneity was observed mostly using the lymph node gate; this finding was not one-sided