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HelpTest Code CDG Carbohydrate Deficient Transferrin for Congenital Disorders of Glycosylation, Serum
Additional Codes
| Mayo | CDG |
| Epic ID | LAB3126 |
Special Instructions
Specimen Type
SerumOrdering Guidance
This test is for congenital disorders of glycosylation. If the ordering healthcare professional is looking for evaluation of alcohol abuse, order CDTA / Carbohydrate Deficient Transferrin, Adult, Serum.
If either PMM2-CDG (CDG-Ia) or MPI-CDG (CDG-Ib) is suspected, order PMMIL / Phosphomannomutase and Phosphomannose Isomerase, Leukocytes.
Necessary Information
1. Patient's age is required.
2. Reason for testing is preferred.
Specimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.1 mL Serum
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Minimum Volume
Serum: 0.05 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Frozen (preferred) | 45 days |
| Refrigerated | 28 days | |
| Ambient | 7 days |
Transport frozen.
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Method Name
Affinity Chromatography Mass Spectrometry (MS)
Testing Algorithm
Suggested Testing Strategy:
|
Disorder |
Target |
Mayo Test ID |
|
N-glycan, core 1 mucin type O-glycosylation, and conserved oligomeric Golgi (COG) complex defects |
Transferrin, apolipoprotein CIII |
CDG / Carbohydrate Deficient Transferrin for Congenital Disorders of Glycosylation, Serum |
|
N-glycan, core 1 mucin type O-glycosylation, and COG complex defects |
Serum total N-linked glycans, transferrin, and apolipoprotein CIII |
CDGN / Congenital Disorders of N-Glycosylation, Serum (includes test ID CDG) Stepwise analysis of transferrin, apolipoprotein CIII, and serum total N-glycans |
|
alpha-dystroglycanopathies, GPI anchor disorders |
Genes: DAG1, FKRP, FKTN, ISPD, LARGE1, POMGNT1, POMGNT2, POMT1, POMT2 PIGA, PIGL, PIGM, PIGN, PIGO, PIGT, PIGV, PIGW, PGAP2, PGAP3 |
CDGGP / Congenital Disorders of Glycosylation Gene Panel, Varies |
For more information see:
Congenital Disorders of Glycosylation: Screening Algorithm
Epilepsy: Unexplained Refractory and/or Familial Testing Algorithm.
Useful For
Screening for congenital disorders of glycosylation
This test is not useful for screening patients for chronic alcohol abuse.
Day(s) Performed
Monday, Thursday
Report Available
3 to 6 daysReference Values
|
Ratio |
Normal |
Indeterminate |
Abnormal |
|
Transferrin mono-oligo/di-oligo ratio |
≤0.06 |
0.07-0.09 |
≥0.10 |
|
Transferrin A-oligo/di-oligo ratio |
≤0.011 |
0.012-0.021 |
≥0.022 |
|
Transferrin tri-sialo/di-oligo ratio |
≤0.05 |
0.06-0.12 |
≥0.13 |
|
Apo CIII-1/Apo CIII-2 ratio |
≤2.91 |
2.92-3.68 |
≥3.69 |
|
Apo CIII-0/Apo CIII-2 ratio |
≤0.48 |
0.49-0.68 |
≥0.69 |
CPT Code Information
82373