Although liver cancer ranks second to lung cancer in terms of incidence and mortality rate, it is not unreasonable to call it the “cancer of cancers” because the early symptoms are not obvious and difficult to detect and diagnose. The best treatment stage for liver cancer is in the early stage, when the tumor has not yet expanded and metastasized, the best way is surgery to kill it in one stroke. Early detection and early treatment are the advice of every doctor, and every patient, including healthy people, should be alert and worthy of attention. Every disease has its own fixed high-risk group, and liver cancer is no exception. The high-risk group of liver cancer is the group with the highest possibility of developing liver cancer. Among this group, the first group that comes to mind is those who have a history of liver cancer and therefore have a much higher chance of recurrence and reoccurrence than healthy people. In addition, long-term carriers of the hepatitis B virus should also be included in the group of people at high risk for liver cancer, because the hepatitis B virus is a common cause of liver cancer. Middle-aged people who are over 40 years old and have hepatitis or cirrhosis are also at high risk for liver cancer. If you have been carrying the hepatitis B virus for a long time and have been drinking a lot of alcohol for a long time, you have a higher chance of developing cirrhosis and liver cancer. For people at high risk, it is important to be alert to subtle changes in their bodies. If you are at high risk of liver cancer, the only way to detect and treat the disease early is to have regular liver checkups. The frequency of physical examination for the general public is once a year, while that for people at high risk of liver cancer is once every three months, and once identified as a high-risk group for liver cancer, such examination must continue for life. On the surface, it seems that such a checkup is too frequent and has to last for life, so is it troublesome? Most people are worried about the cost of liver examination every three months. “The annual physical examination for people with high risk of liver cancer is different from normal people, so the cost of examination every three months is definitely higher than that of normal people. Such regular checkups are very important for people with high risk of liver cancer, as they can definitely prevent cancer before it happens and provide early detection and treatment. What tests should be done for primary liver cancer? 1.Ultrasound examination B ultrasound examination is economical and convenient, and can show the size, shape and location of tumor, with a diagnostic accuracy of about 90%. The detection rate of liver lesions is also relatively high. Generally speaking, it takes about 4 to 6 months for liver cancer to grow from 1cm to 3cm at the earliest. Therefore, if liver cancer is not seen in the first ultrasound liver cancer examination, it should still be below 3cm if you take another one in 4-6 months, and the treatment effect should be good. CT is a very important tool to check liver cancer, and it is more commonly done in China. However, when the diameter of liver cancer is less than 2cm or the density is close to normal liver parenchyma, CT is difficult to show. Liver cancer is diffuse, which is not easily detected by CT; it is difficult to distinguish primary or secondary liver cancer. 3.PET-CT PET-CT is one of the tests for early detection of liver cancer and can be considered for patients with hepatitis B. PET-CT is a functional molecular imaging system that integrates PET and CT into one, which can be used for precise anatomical localization of lesions through CT morphological imaging and reflect biochemical metabolic information of occupying tissues in the liver through PET functional imaging. It is also possible to understand the overall condition and assess the metastatic situation to achieve the purpose of early detection of lesions, and to understand the size and metabolic changes before and after tumor treatment. In the past, MRI is not as ideal as CT examination, but nowadays, with the continuous development of MRI technology, the scanning time is getting faster and faster, and the resolution is getting higher and higher, which can be used as a more accurate judgment for some small lesions in the liver. Nowadays, MRI plays a very important role in the examination of liver cancer.