Cystine, Quantitative Urine

Last Modified: 9/10/2018 6:34:35 AM

Specimen Requirements: 1.8 mL Urine in a Yellow Capped Tube
Collection Instructions: Patient Age must be included on the order

Do not add perservatives

Do not Thaw

Minimum Volume: 0.5 mL Urine
Transport & Storage: Temperature/Stability:

60 days Frozen

Rejection Criteria: Urine with a pH less than 2.0
Reference Range:

Pediatric (<18 Years)     3.2 - 12.6 mmol/mol creat
Adult 3.4 - 16.4 mmol/mol creat
Creatinine Random Urine    
≤6 Months 0.18-2.48 mmol/L
7-11 Months   0.18-2.74 mmol/L
1-2 Years 0.18-9.72 mmol/L
3-8 Years 0.18-11.49 mmol/L
9-12 Years 0.18-14.14 mmol/L
Adult 1.77-23.31 mmol/L

Methodology: Liquid Chromatography/Mass Spectrometry (LC/MS)
Clinical Significance: Cystinuria is an autosomal recessive disease in which dibasic amino acids, including cystine, are excreted in excess.
Custom Panel: No


Turn Around Time: 5 to 7 days
Days Performed: Tuesday, Thursday
Sites Performed: Quest - Chantilly to San Juan Capistrano
PHL Test Code: MSOT
EPIC Test Code:
Send Out Test Code: 6017 [401X]
Alternate Test Names: Cystine, Quantitative, Random Urine
Included Tests: Cystine; Creatinine
CPT Coding: 82131, 82570

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