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HelpTest ID PSYCF Psychosine, Spinal Fluid
Ordering Guidance
This test is recommended as a diagnostic or monitoring test when spinal fluid is collected primarily to determine protein content in a patient at risk of or monitored for the development of signs of Krabbe disease.
An additional and less invasive diagnostic or monitoring test is measurement of psychosine in red blood cells; see PSYR / Psychosine, Whole Blood.
Shipping Instructions
Send on dry ice. Avoid freeze thaw cycles.
Necessary Information
1. Patient's age is required.
2. Date of hematopoietic stem cell transplantation (HSCT), if performed.
Specimen Required
Container/Tube: Sterile vial.
Specimen Volume: 0.15 mL
Collection Instructions: Do not aliquot.
Secondary ID
606146Useful For
Aiding in the biochemical diagnosis of Krabbe disease using cerebrospinal fluid specimens
Follow-up of individuals affected with Krabbe disease
Follow-up testing after an abnormal newborn screening result for Krabbe disease
Monitoring individuals at risk to develop late onset Krabbe disease
Monitoring individuals with Krabbe disease after hematopoietic stem cell transplantation
Specimen Type
CSFSpecimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| CSF | Frozen | 7 days |
Reject Due To
| Gross hemolysis | Reject |
Reference Values
Normal < 0.04 nmol/L
Day(s) Performed
Tuesday, Thursday
Report Available
3 to 7 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82542
Forms
If not ordering electronically, complete, print, and send a Biochemical Genetics Test Request (T798) with the specimen.