has_part has part has part characteristic of inheres in inheres in has modifier foam cell Atherosclerosis Foam cells Presence of foam cells Lipid-laden histiocytes Foamy macrophages HP:0003651 Foamy histiocytes MSH:D005487 SNOMEDCT_US:16980002 Foam cells may contain polymorphic cytoplasmic inclusions consisting of lamellar osmiophilic membranes on electron microscopy. The presence of foam cells, a type of macrophage that localizes to fatty deposits on blood vessel walls, where they ingest low-density lipoproteins and become laden with lipids, giving them a foamy appearance. HP:0003650 UMLS:C0016390 abnormal increased amount