Glutamine and Histidine Concentration in Cerebrospinal Fluid

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like headaches, seizures, or neurological issues that suggest abnormalities in the brain’s chemistry. It could also be part of a broader evaluation for conditions like meningitis, metabolic disorders, or genetic brain diseases.

What to Expect Before the Test

You’ll likely have a lumbar puncture (spinal tap) to collect CSF. This involves lying on your side, and a small needle is inserted into your lower back to draw fluid. The procedure is usually quick and may cause mild discomfort. You may be asked to fast or avoid certain medications beforehand, but follow your provider’s instructions.

What the Results Mean

Results show the mass concentration of glutamine and histidine in the CSF. While reference ranges aren’t always standardized, abnormal levels may indicate metabolic imbalances, genetic disorders, or infections. Your provider will interpret these results in the context of your symptoms and medical history.

Common Conditions Monitored

This test is often used to investigate conditions like aminoacidopathies (inherited metabolic disorders), mitochondrial disorders, or central nervous system infections. Elevated or low levels might suggest specific diagnoses that require further testing or treatment.