A<unk>  (pl.<unk> s or<unk> ta) (condition:<unk> tosis), from Greek xanthos, ξανθος, "yellow", is a deposition of yellowish cholesterol-rich material in tendons or other body parts in various disease states. They are cutaneous manifestations of lipidosis in which there is an accumulation of lipids in large foam cells within the skin.
They are associated with hyperlipidemias, both primary and secondary types.
Tendon<unk>  are associated with Type II hyperlipidaemia and chronic biliary obstruction.
Palmar<unk> ta and tuboeruptive<unk> ta (over knees and elbows) occur in Type III hyperlipidaemia
Xanthoma
Nevus
Keratoacanthoma
Angiokeratoma
Papilloma
Lipoma
Cavernous transformation
Apudoma