Lipiduria

{{Short description|Presence of lipids in the urine}} '''Lipiduria''' or '''lipuria''' is the presence of lipids in the urine. Lipiduria is most frequently observed in nephrotic syndrome where it is passed as lipoproteins along with other proteins.<ref> {{cite journal |vauthors=Klahr S, Tripathy K, Bolanos O |title=Qualitative and Quantitative Analysis of Urinary Lipids in the Nephrotic Syndrome |journal=J. Clin. Invest. |volume=46 |issue=9 |pages=1475–81 |year=1967 |pmid=6036540 |doi=10.1172/JCI105639 |pmc=292893}} </ref><ref name="Significance of lipiduria">{{cite web |url=http://www.uptodate.com/patients/content/topic.do?topicKey=~Kk.Q0M6Zsr/lvq. |title=Significance of lipiduria |website=www.uptodate.com |url-status=dead |archive-url=https://web.archive.org/web/20100105032442/http://www.uptodate.com/patients/content/topic.do?topicKey=~Kk.Q0M6Zsr/lvq. |archive-date=2010-01-05}} </ref> It has also been reported as a sign following fat embolism.<ref>{{cite journal |vauthors=Findlay J, DeMajo W |title=Cerebral fat embolism |journal=Canadian Medical Association Journal |volume=131 |issue=7 |pages=755–7 |date=1 January 1984|pmid=6478364 | format=Image & PDF |pmc=1483580 }}</ref>

When lipiduria occurs, epithelial cells or macrophages contain endogenous fats. When filled with numerous fat droplets, such cells are called oval fat bodies. Oval fat bodies exhibit a "Maltese cross" configuration under polarized light microscopy.<ref name=Urinalysis>{{Cite web|url=https://webpath.med.utah.edu/TUTORIAL/URINE/URINE.html|title=Urinalysis|website=webpath.med.utah.edu}}</ref> The Maltese cross appearance occurs because of its liquid-crystalline structure giving it a double refraction (birefringence).

==See also== * Urostealith

==References== {{Reflist}}

Category:Urine