Lipomas are rare, benign (noncancerous) tumors composed of fatty tissue. They are sometimes associated with other congenital abnormalities of the nervous system. Lipomas vary in size. Single or multiple tumors may be present.
Lipomas most commonly appear in the corpus callosum. However, they can appear in other areas of the brain, usually close to the midline.
A lipoma may cause no symptoms and often goes unnoticed until a scan is performed for other medical reasons.
Conservative treatment is usually recommended because these tumors are benign and rarely cause symptoms. Surgery may be suggested in some cases.