Many will exhibit a hypoechoic "halo" (Fig. 5). There is some controversy as to whether the halo is composed of compressed normal liver parenchyma, new proliferating tumor, edema, a rim of ...

In adults and in children older than 2–3 months, the renal cortex is normally less echogenic than the liver parenchyma. Some researchers have suggested that hyperechogenicity of the renal cortex ...