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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. [1] [2] It has also been reported as a sign following fat embolism. [3] When lipiduria occurs, epithelial cells or macrophages contain endogenous fats.
Initially, these lipid droplets were considered to merely serve as fat depots, but since the discovery in the 1990s of proteins in the lipid droplet coat that regulate lipid droplet dynamics and lipid metabolism, lipid droplets are seen as highly dynamic organelles that play a very important role in the regulation of intracellular lipid storage ...
Fat embolism syndrome occurs when fat enters the blood stream (fat embolism) and results in symptoms. [1] Symptoms generally begin within a day. [1] This may include a petechial rash, decreased level of consciousness, and shortness of breath. [1] Other symptoms may include fever and decreased urine output. [2] The risk of death is about 10%. [2]
The fat droplets thus formed can be attacked by pancreatic lipase. Structure of a bile acid (cholic acid), represented in the standard form, a semi-realistic 3D form, and a diagrammatic 3D form Diagrammatic illustration of mixed micelles formed in the duodenum in the presence of bile acids (e.g. cholic acid) and the digestion products of fats ...
[131] [132] [133] Fat droplets and oval fat bodies may be present in a condition called lipiduria, which has various causes, most notably nephrotic syndrome. Contaminants from the outside environment, such as starch granules, hair, and clothing fibers, may be seen but are not reported. [134]
After the droplets fuse, a mature droplet (full-fledged globule) is formed and can then partake in neutral lipid synthesis or lipolysis. Globules of fat are emulsified in the duodenum into smaller droplets by bile salts during food digestion, speeding up the rate of digestion by the enzyme lipase at a later point in
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Urine typically contains epithelial cells shed from the urinary tract, and urine cytology evaluates this urinary sediment for the presence of cancerous cells [2] [3] from the lining of the urinary tract, and it is a convenient noninvasive technique for follow-up analysis of patients treated for urinary tract cancers.