Xanthomas are lesions on the skin containing cholesterol and fats. They are often associated with inherited disorders of lipid metabolism (inherited problems with the way that fats are broken down and used).
Update Date 5/20/2014
Updated by: Larry A. Weinrauch MD, Assistant Professor of Medicine, Harvard Medical School, Cardiovascular Disease and Clinical Outcomes Research, Watertown, MA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.