hyperchylomicronemia MP:0009699 MPheno.ontology increased circulating chylomicron numbers increased plasma chylomicron levels increased plasma concentrations of chylomicrons, the large lipid droplet (up to 100 mm in diameter) of reprocessed lipid synthesized in epithelial cells of the small intestine and containing triacylglycerols, cholesterol esters, and several apolipoproteins increased serum chylomicron numbers abnormal circulating lipoprotein level