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Lab Manual for Moffitt-Long and Mount Zion

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Cystine, Quantitative, random urine

Item Value
Approval req'd? No
Available Stat? No
Test code CUQT
Test group Cystine
Performed by Quest
Sendout? Yes
Method IEC
Container type Urine cup
Amount to Collect See preferred volume
Sample type Random urine
Preferred volume 2 mL urine
Min. Volume 1.8 mL urine
Processing notes Freeze sample at -20C. Order Quest # 9605N.
Units mmol/mol creatinine
Normal range
0-30 days 24.0-75.5 mmol/mol creatinine
1-23 months 7.7-80.2 mmol/mol creatinine
2-18 years. 2.8-14.1 mmol/mol creatinine
≥ 18 years. 4.9-23.7 mmol/mol creatinine
Turn around times Test run as needed, at least 3x weekly. Turnaround 3-5 days
Additional information Clinical Significance: Cystinuria is an autosomal recessive disease in which dibasic amino acids, including cystine, are excreted in excess. Also part of Amino Acid Analysis.

Pediatric reference ranges are from Soldin SJ et al., eds., Pediatric Reference Ranges, 2nd ed., AACC Press,1997, pp. 20-29.
LOINC code 22687-8
Last Updated 3/24/2013 7:48:21 PM
Entry Number 290

If you have additional questions regarding this test, please call: 415-353-1667

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