CausesBy Mayo Clinic staff
It's not clear what causes a liver hemangioma to form. Doctors believe liver hemangioma is congenital — meaning that you're born with it.
Liver hemangioma usually occurs as a single abnormal collection of blood vessels that is less than about 1.5 inches (4 centimeters) wide. Occasionally liver hemangiomas can be larger or occur in multiples.
In most people, liver hemangioma will never grow and never cause any signs and symptoms. But in a small number of people, liver hemangioma will grow to cause complications and require treatment. It's not clear why this happens.
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- Curry MP, et al. Hepatic hemangioma. http://www.uptodate.com/home/index.html. Accessed Nov. 15, 2010.
- Your liver. Your life. American Liver Foundation. http://www.yourliver.org/Liver-Wellness-Presentation.pdf. Accessed Nov. 16, 2010.