Generally speaking, for diseases of the hepatobiliary system, most of us conduct examinations using ultrasound because it is very convenient, safe, involves no radiation, and the results are relatively quick. Generally, liver cancer can appear as hypoechoic, hyperechoic, or mixed echogenicity on ultrasound. Most such liver cancer nodules may have a complete capsule, but some may not have a complete capsule. Overall, this type of liver cancer tends to grow expansively and invasively, compressing the surrounding normal liver tissue, and possibly showing some halo signs around it. The vast majority of liver cancers do not occur independently; they usually develop gradually from cirrhosis. Therefore, there is often an enlargement of the portal vein, and in some cases of liver cancer with metastasis, thrombosis in the portal vein can be seen.