Xanthoma

A xanthoma (or xanthomata or xanthomatosis) (from Greek xanthos, ξανθος, "yellow") is a deposition of yellowish cholesterol-rich material in tendons and other body parts in various disease states:Tendon xanthomas (associated with familial hypercholesterolemia, cerebrotendineous xanthomatosis and phytosterolemia)Palmar xanthomasEruptive xanthomasTubo-eruptive xanthoma Xanthoma tuberosum
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Xanthoma /xan·tho·ma/ a tumor composed of lipid-laden foam cells, which are histiocytes containing cytoplasmic lipid material. [more]Xanthoma - Community and Resources

Noun
1. a skin problem marked by the development (on the eyelids and neck and back) of irregular yellow nodules; sometimes attributable to disturbances of cholesterol metabolism
(hypernym) skin disease, disease of the skin, skin disorder, skin problem, skin condition
(hyponym) xanthelasma

(n.)
A skin disease marked by the development or irregular yellowish patches upon the skin, especially upon the eyelids; -- called also xanthelasma.
  

Yellowish firm nodules in the skin frequently indicating underlying disease, such as diabetes, disorder of fats (lipid disorder or hyperlipidemia), or other conditions.