Adult xanthogranulomatosis associated with abnormal plasma apolipoprotein levels.
A case of adult xanthogranulomatosis was investigated in depth for lipid abnormalities. The xanthogranulomatous lesion was shown to be composed primarily of cholesterol esters and triglycerides. Fasting plasma lipid levels and lipoprotein concentrations were within normal limits. Plasma lipoprotein electrophoresis and immunoelectrophoresis demonstrated normal high-density lipoprotein (HDL) and low-density lipoprotein mobilities. Polyacrylamide-gel isoelectric-focusing electrophoresis revealed increased levels of very-low-density apolipoprotein (apo) E, especially apo E-III. In the HDL fraction, apo-C-III and apo-E levels were both found to be slightly elevated. These findings might imply a causal relationship between the abnormal plasma apolipoprotein levels and the xanthogranulomatous disease.