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Test ID LSDS Lysosomal Disorders Screen, Random, Urine


Ordering Guidance


This test is the recommended screening test for the initial workup of a suspected lysosomal disorder (LD) when the patient's clinical features are not suggestive of any specific LD.



Necessary Information


1. Patient's age is required.

2. Biochemical Genetics Patient Information (T602) is recommended. This information aids in providing a more thorough interpretation of results. Send information with specimen.



Specimen Required


Patient Preparation:

1. Do not administer low-molecular weight heparin before specimen collection.

2. Baby wipes or wipes containing soaps or lotions should not be used before specimen collection because these may interfere with results.

Supplies: Urine Container, 60 mL (T313)

Container/Tube: Clean, plastic urine container with no metal cap or glued insert

Specimen Volume: 12 mL

Pediatric Volume: 3.5 mL

Collection Instructions:

1. Collect a random urine specimen (early morning preferred).

2. No preservative.


Secondary ID

606771

Useful For

Screening patients suspected of having a lysosomal disorder

Specimen Type

Urine

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 15 days
  Frozen  90 days

Reject Due To

  All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Reference Values

Dermatan Sulfate:

≤1.00 mg/mmol creatinine

 

Heparan Sulfate:

≤4 years: ≤0.50 mg/mmol creatinine

≥5 years: ≤0.25 mg/mmol creatinine

 

Chondroitin-6 Sulfate:

≤24 months: ≤10.00 mg/mmol creatinine

25 months-10 years: ≤2.50 mg/mmol creatinine

≥11 years: ≤1.50 mg/mmol creatinine

 

Keratan Sulfate:

≤12 months: ≤2.00 mg/mmol creatinine

13-24 months: ≤1.50 mg/mmol creatinine

25 months-4 years: ≤1.00 mg/mmol creatinine

5-18 years: ≤0.50 mg/mmol creatinine

≥19 years: ≤0.30 mg/mmol creatinine

 

Free Sialic Acid:

≤4 weeks: ≤208 mmol/mol creatinine

5 weeks-12 months: ≤104 mmol/mol creatinine

13 months-18 years: ≤100 mmol/mol creatinine

≥19 years: ≤38 mmol/mol creatinine

 

Total Sialic Acid:

≤4 weeks: ≤852 mmol/mol creatinine

5 weeks-12 months: ≤656 mmol/mol creatinine

13 months-18 years: ≤335 mmol/mol creatinine

≥19 years: ≤262 mmol/mol creatinine

 

Total/Free Ratio:

≤4 weeks: 1.94-18.68

5 weeks-12 months: 2.34-13.85

13 months-18 years: 2.63-9.18

≥19 years: 3.35-15.81

 

Ceramide Trihexosides:

Negative

 

Sulfatides:

Negative

 

Oligosaccharides:

Negative

An interpretive report will be provided.

Day(s) Performed

Varies

Report Available

8 to 14 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

83789

83864

84377

84275