CSF 5-Methyltetrahydrofolate is useful for determining a deficiency of folate in the central nervous system. CSF 5-Methyltetrahydrofolate may also be used for assessment of Variants of Uncertain Significance (VUS) identified during genetic testing (e.g. Next Generation Sequencing or Capillary Sequencing Testing). 5-Methyltetrahydrofolate (5-MTHF) is the predominant form of folate in cerebrospinal fluid (CSF). Low CSF 5-MTHF levels are associated with inborn errors of metabolism affecting folate metabolism , dietary deficiency of folate, cerebral folate syndromes and Kearns-Sayre syndrome. Symptoms may include, anemia, developmental delay, seizures, depression and dementia.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
10 - 14 days
Collect samples into 5 numbered 2.0 mL microcentrifuge tubes (or similar): Tube 1: 0.5 mL, Tube 2: 1.0 mL, Tube 3: 1.0 mL, Tube 4: 1.0 mL, Tube 5: 1.0 mL OR collect entire sample into a single sterile tube, which is considered a pooled CSF sample. Freeze.
Test sent to MNG Laboratories.