Benign liver tumors are relatively frequent. Most are asymptomatic, some result in development of hepatomegaly, pain in the right upper abdomen or intraperitoneal bleeding. Most are randomly during ultrasound or other imaging tests found (Imaging tests of the liver and gall bladder). Liver function tests are usually in the normal range or deviate only slightly from. imaging techniques are often sufficient for diagnosis, but a biopsy can also be necessary. Treatment is necessary only in certain circumstances. Hepatocellular adenoma Among the benign tumors, it is particularly important to recognize hepatocellular adenoma as such. It preferably occurs in women of childbearing age, and indeed especially when taking oral contraceptives, possibly through an estrogen effect (1). Most adenomas are asymptomatic, only very large can cause discomfort in the right upper abdomen. Rarely adenomas manifest as peritonitis and circulatory shock due to rupture and intraperitoneal hemorrhage. Rarely they can become malignant. A diagnostic suspicion arises due to ultrasound or computed tomography, but sometimes a biopsy to confirm the diagnosis is required. Contraceptives associated adenomas may regress on discontinuation of contraceptives. If adenomas not regress or if they are subcapsular or> 5 cm, surgical resection is often recommended. Focal nodular hyperplasia This localized Hämartom may resemble histologically a makronodulären cirrhosis. The diagnosis is usually based on an ultrasound, MRI or CT scan with contrast, a biopsy may be necessary to confirm. Treatment is rarely required. Hemangioma hemangiomas are small and usually asymptomatic; they occur in 1-5% of adults. Symptoms are more likely when the hemangiomas are> 4 cm; Symptoms include nausea, bloating, and less frequently, loss of appetite, nausea, early satiety and pain as a result of bleeding or thrombosis. These tumors often have a characteristic highly vascular appearance. Hemangiomas are usually discovered by chance during an ultrasound examination, computed tomography or MRI. Computer scans typically show a well defined hypodense lesion. Ultrasound often impressed hyperechoic. When contrast agents are used, shows a first peripheral contra enrichment, followed by a centripetal replenishment ( “iris” phenomenon). Treatment is usually not necessary. If the symptoms are distressing or a hemangioma grows quickly, a resection may be considered. In infants to hemangiomas often form spontaneously by the age of 2 years. Nevertheless, large hemangiomas can occasionally form arteriovenous shunts that are sufficient to cause heart failure and sometimes disseminated intravascular coagulopathy. In these cases, surgical removal can take place. Konservatve measures that may be attempted include high-dose corticosteroids, diuretics and digoxin sometimes carried out with, in order to improve heart function, interferon alfa (s.c.) administered, and the selective embolization. Rarely, a liver transplant may be required. Other benign tumors lipomas (usually asymptomatic) and localized fibrous tumors (eg. As fibroids) rarely occur in the liver. Benign Gallengangsadenome are rare, inconsequential, and quite by accident, as a rule. They are sometimes confused with metastases. Note Marrero YES, Ahn J, Rajender Reddy K; American College of Gastroenterology. ACG clinical guideline: the diagnosis and management of focal liver lesions. Am J Gastroenterol 109 (9): 1328-1347, 2014. doi: 10.1038 / ajg.2014.213.