The following benign tumors are commonly found in the liver:
Hepatic hemangioma
The most common benign tumors of the liver are pathologically divided into 4 main types: cavernous hemangioma, sclerosing hemangioma, hemangioendothelioma, and capillary hemangioma, with cavernous hemangioma being the most common.
Focal nodular hyperplasia
After hemangioma, the second most common benign tumor in the liver, consisting of normal hepatocytes, Kufu cells, blood vessels, and bile ducts.
Focal nodular hyperplasia is pathologically an abnormal proliferation of hepatocytes and is not a true tumor, and its cancer rate is low.
Hepatic adenoma
Rare benign tumors of hepatocellular origin, ranking third among benign tumors of the liver. Hepatic adenomas consist of strips of hepatocytes and dilated blood sinuses without bile duct structures. The tumor cells are well differentiated, resemble normal hepatocytes, and contain large amounts of glycogen and lipids.
Hepatic adenomas are prone to intratumoral hemorrhage and cancer because of the rich blood supply, and should be treated with surgery as soon as possible if detected.
Hepatitis pseudotumor
A nonspecific inflammatory mass in the liver caused by multiple inflammatory factors, associated with inflammatory liver infection and in vivo immune response.
Pathologically, there are yellow granulomatous, plasmacytoid granulomatous, and vitreous sclerotic types.
Other rare tumors
There are lipomas, vascular smooth muscle lipomas, vascular endothelial cell tumors, and bile duct cystadenomas.