Xanthomatosis refers to a condition that is characterized by the presence of yellowish deposits of cholesterol buildup in various parts of the body, including the skin, tendons, and bones. Synonyms for xanthomatosis may include xanthelasma, which describes the yellow fatty deposits that form under the skin around the eyes. Additionally, xanthoma refers to the cholesterol deposits that form on tendons and can lead to a restricted range of motion. Other related terms may include hyperlipidemia, which refers to abnormally high levels of lipids in the blood, as well as atherosclerosis, which describes the buildup of plaque in the arteries, leading to reduced blood flow.