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Test Code PSYCF Psychosine, Spinal Fluid

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

Collection Container/Tube: Sterile vial.

Specimen Volume: 0.150 mL

Collection Instructions: Do not aliquot.

Useful For

Aids 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 of individuals at risk to develop late onset Krabbe disease


Monitoring of individuals with Krabbe disease after hematopoietic stem cell transplantation

Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Reporting Name

Psychosine, CSF

Specimen Type


Specimen Minimum Volume

0.100 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
CSF Frozen 7 days

Reference Values

Normal < 0.04 nmol/L

Day(s) and Time(s) Performed

Tuesday, Thursday; 8 a.m.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
PSYCF Psychosine, CSF 93686-4


Result ID Test Result Name Result LOINC Value
606150 Interpretation (PSYCF) 59462-2
606146 Psychosine, CSF 93686-4
605158 Reviewed By 18771-6