Often, hyperechoic metastases correspond to hypervascular lesions, including metastases from renal cell carcinoma, breast carcinoma, and islet cell tumors (Fig. 6). Hypoechoic masses tend to be ...

3). In keeping with their variable interior, malignant lesions have a heterogeneous internal pattern that is primarily hypoechoic but also may contain hyperechoic and anechoic areas. Figure 3.