The liver is the most important metabolic organ in the body. This is where food is metabolized and stored, various building materials for the body are synthesized and excreted via waste products. Bile is transported via the bile ducts to the gallbladder for storage, which plays an important role in the absorption of fats from the intestine. Due to its active metabolism, the liver is susceptible to pathological changes in its tissue (liver parenchyma), e.g. fatty degeneration caused by excessive calorie intake, or inflammation, which can for example be triggered by alcohol, medication and viruses. Chronic damage can lead to scarring – liver cirrhosis – with impaired liver function. But the liver is also particularly susceptible to metastases, the colonization of cancer foci in the intestines, lungs and many other organs. This is due to the dual blood supply to the liver, which is supplied on the one hand via the hepatic artery and on the other via the portal vein, which carries nutrient-rich blood from the intestine to the liver, but also cancer cells.