Monday, August 1, 2016

Hexagonal crystals in cystinuria mnemonic

Hexagonal crystals are seen in cystinuria.

Cystinuria is an inherited autosomal recessive disease that is characterized by high concentrations of the amino acid cystine in the urine, leading to the formation of cystine stones in the kidneys, ureter, and bladder. The stones may be identified by a positive nitroprusside cyanide test.

Cystinuria is caused by mutations in the SLC3A1 and SLC7A9 genes. These defects prevent proper reabsorption of basic, or positively charged, amino acids: Cysteine, lysine, ornithine, arginine.

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