Saturday, February 18, 2012

iSEDIMENT

What is the cast?

The answer to the iSEDIMENT quiz of Feb 16, 2012 is: Calcium oxalate dihydrate crystals: Calcium oxalate dihydrate crystals are normally found in the urine sediment in small quantities. They are small square crystals with an "x" in their center.

Calcium-containing stones
The most common type of kidney stones worldwide are calcium-containing stones - 80% of all cases in the United States. Typically these stones are either calcium oxalate alone or in combination with calcium phosphate in the form of apatite or brushite. Factors that promote the precipitation of oxalate crystals in the urine, such as primary hyperoxaluria, are associated with the development of calcium oxalate stones. The formation of calcium phosphate stones is associated with conditions such as hyperparathyroidism and renal tubular acidosis.

Source: Junaid Mohamed

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