Cerebrospinal Fluid (CSF) Nonhematic Cell Count (Qualitative)

What This Test Measures

The test focuses on counting cells in your CSF that are not red or white blood cells (hematic cells). These nonhematic cells may include lymphocytes, macrophages, or other immune cells. The result is qualitative, meaning it provides a general category (e.g., normal, increased, or decreased) rather than a precise number.

Why It’s Done

Doctors may order this test if you have symptoms like severe headaches, neck stiffness, fever, or neurological problems. It helps diagnose conditions such as meningitis, encephalitis, or other inflammatory or infectious processes in the central nervous system.

Sample Collection and Process

A small amount of CSF is collected through a procedure called a lumbar puncture (spinal tap). The sample is then examined under a microscope to identify and count nonhematic cells. The test does not require fasting or special preparation.

What the Results Mean

Results are interpreted qualitatively rather than numerically. An elevated count of nonhematic cells might suggest an immune response, infection, or other inflammatory process. A normal result does not rule out all possible conditions, so further testing may still be needed.