First, I should say that stating that he has a lesion in his liver only states that there was an abnormality on the scan. Although lesions can be tumors, they can also be infections or areas of trauma. Since the most likely possibility is that his is some kind of tumor, I'll discuss those possibilities below. 1. Cavernous Hemangioma-These are the most common liver tumor and they are benign.
https://www.zocdoc.com/answers/3008/how-common-are-liver-lesions
The liver can be affected by primary liver cancer, which arises in the liver, or by cancer which forms in other parts of the body and then spreads to the liver.
http://www.webmd.com/cancer/understanding-liver-cancer-basic-information
Tweet. Liver lesions is a term that can be applied to any of various abnormalities of the liver, including those produced by serious conditions such as liver cancer or cirrhosis but much more commonly those that result from more benign conditions such as cysts or liver hemangioma.
http://www.hepaticsteatosis.net/liver-lesions.html
None of these tumors are treated like liver cancer. They may need to be removed surgically if they cause pain or bleeding. Liver cancers include: 1  Hepatocellular carcinoma (HCC). 2  Cholangiocarcinoma (These are really cancers of the bile duct. 3  They will not be discussed in this article.).
http://www.webmd.com/cancer/understanding-liver-cancer-basic-information
Treatment Options for Metastatic Liver Lesions. Once a metastatic liver lesion is detected, patients should undergo a rapid medical, oncologic and surgical evaluation to determine the most appropriate treatment. The treatment may vary between patients, and will be tailored to best fit each individual's specific needs.
http://www.cpmc.org/advanced/liver/patients/topics/MetasticLiver-profile.html
Liver Hemangioma. The most common form of liver lesion is liver hemangioma, a benign tumor that normally causes no symptoms and poses no danger. On rare occasions, an especially large hemangioma will cause symptoms such as pain, nausea, or enlarged liver, and may be removed surgically.
http://www.hepaticsteatosis.net/liver-lesions.html
Symptoms only occur if they become big enough to press on another structure. There is a small risk that they can burst an bleed, but this risk is low unless they are very large in which case they are removed. Otherwise the tumors are left alone. They are not biopsied because of the risk of bleeding.
https://www.zocdoc.com/answers/3008/how-common-are-liver-lesions
The most common tumor to metastasize to the liver is colon cancer. Some of these can be distinguished just by the imaging, others require biopsy. I would ask the physician who ordered the liver scan which of these possibilities he or she thinks it is. Good luck. This answer is for general informational purposes only and is not a substitute for professional medical advice.
https://www.zocdoc.com/answers/3008/how-common-are-liver-lesions
Because the liver is made up of several different types of cells, several types of tumors can form there. Some of these are benign (noncancerous), and some are cancerous and can spread to other parts of the body (metastasize). These tumors have different causes and are treated differently. The outlook for health or recovery depends on what type of tumor you have. The more common benign tumors of the liver include: 1  Hemangioma.
http://www.webmd.com/cancer/understanding-liver-cancer-basic-information
Although liver lesions can be a sign of (or consist of) dangerous liver conditions, most of the time they are not a cause for concern. It is disconcerting to find out that an abnormal growth has appeared on such a vital organ as your liver, but it's a common occurrence and not a reason to panic.
http://www.hepaticsteatosis.net/liver-lesions.html
what can cause lesions on your liver
Large hemangioma can cause lesions on your liver.