Xanthoma of bone: first sign of hyperlipidemia type IIB: a case report.

A xanthoma, located in the ulna, not accompanied by the traditional cutaneous and tendinous manifestations (xanthoma and xanthelasma) and with a late onset of alterations in lipid values, was diagnosed in a 56-year-old man. The lesion had a slow but constant growth leading to internal calcifications. Hyperlipidemia Type IIB occurred 15 years after the xanthoma first was detected by radiographs. Therefore, in this patient, xanthoma of bone was the first sign of dyslipidemia.