Urinalysis – concentration

Here are some simple facts about urine specific gravity, osmolality and their determination from the urinalysis. Specific gravity The reference substance for comparative purposes is water, which therefore has a specific gravity of 1.000. The so-called normal ranges…

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FSGS: The Basics

Gearoid did a nice job reviewing the recent exciting findings surrounding primary Focal Segment Glomerulosclerosis (FSGS) and I thought it would be a good opportunity to review some of the sometimes confusing terminology and clinical basics. To start,…

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Mind the Gap

As Nate mentioned in a previous post, the urinary anion gap is helpful in differentiating whether a non-gap acidosis is of renal or extra-renal origin. Urinary Anion Gap = Na + K – Cl Because the major cation…

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A suPAR breakthrough in FSGS

As has been mentioned in previous post, the identification of the anti-PLA2R antibody has the potential to revolutionize the diagnosis of membranous GN and is already being used clinically on a small scale. It is found in 70%…

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Cystinosis

Cystinosis is an autosomal recessive disease caused by a mutation in CTNS, which encodes the lysosomal transporter of cystine. Without this, cystine gradually accumulates in cells causing progressive damage. The commonest kind is “nephropathic cystinosis” which is the…

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