4). 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 normal liver, hepatic stellate cells (HSCs) are nonparenchymal, quiescent cells whose main functions is to store vitamin A and probably to maintain the normal basement membrane-type matrix.