Gamma-Glutamyl Transferase (GGT) in Cerebrospinal Fluid (CSF)

Why Might This Test Be Done?

Your healthcare provider may order this test if you have symptoms like headaches, neck stiffness, seizures, or neurological issues that could suggest conditions such as meningitis, encephalitis, or other brain/spinal cord disorders. It may also be part of a broader evaluation for trauma, infections, or other neurological conditions.

What Does an Abnormal Result Mean?

Elevated GGT in CSF could indicate inflammation, infection, or injury to the brain or spinal cord. However, results alone are not diagnostic—they are usually interpreted alongside other test results and clinical findings. Low levels may suggest normal function but could also be due to other factors like certain medications.

Sample Collection and Preparation

A small amount of cerebrospinal fluid is collected through a procedure called a lumbar puncture (spinal tap). This involves inserting a needle into your lower back to draw fluid from the spinal canal. The fluid is then sent to the lab for testing. You may feel mild pressure or discomfort during the procedure, but it usually doesn’t cause long-term effects.

What to Expect Before or After the Test

Before the test, inform your provider about any medications you’re taking, recent illnesses, or allergies. Afterward, you may experience mild soreness at the injection site or a slight headache (which can be managed with over-the-counter pain relievers). Avoid heavy lifting or strenuous activity for 24 hours to prevent complications.