CSF Cell Count Interpretation | Advanced Instruments
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CSF Cell Count Interpretation

Normal Results

Cerebrospinal fluid (CSF) is normally clear and colorless. Abnormal CSF may appear cloudy, turbid, bloody, viscous, or clotted. Red blood cells (RBCs) should not be present in normal CSF. Typical normal ranges for white blood cells (WBCs) are shown in the table below1,2,3,4,5,6,7,8,9,10.

Demographic Normal Ranges (WBC/ul)
Neonates (<1 year) 0-30
Ages 1 to 4 years 0-20
Ages 5 to puberty (18 years) 0-10
Adults (18 years) 0-5

Increased WBCs in the CSF may be indicative of meningitis, malignancy, or demyelinating disease. RBCs in the CSF may be indicative of hemorrhage or the result of a traumatic lumbar puncture.11

Traumatic Tap Versus Hemorrhage

When RBCs in CSF are due to a traumatic tap, a visual comparison between the first and last collection tubes will show a significant decrease in color. There will be no color difference in the case of a hemorrhage. Further, a clear and colorless supernatant following centrifugation indicates a traumatic tap since the cells have not yet broken down. A xanthochromic supernatant reveals a hemorrhage.11

Diagnostic Range Guidelines12

Guillain-Barre syndrome0-100 WBC/μLLN>100 mg/dLN

Condition WBCs or RBCs* Major cell type Glucose Protein* Pressure*
Acute bacterial meingitis 100-100.000 WBC/μL PMN D >100 mg/dL I
Viral infections 100-2,000 WBC/μL L N N or I N or I
Guillain-Barré syndrome 0-100 WBC/µL L N >100 mg/dL N
Multiple sclerosis 0-50 WBC/μL L N N or I N
Spinal Cord tumor 0-50 WBC/μL L N N or I N
Cerebral hemorrhage >500.000 RBC/μL

*Figures given for pressure, cell counts, and protein are approximations; exceptions are common.

L = lymphocyte; N= normal; PMN = polymorphonuclear leukocyte; I = increased, D = decreased.


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  11. Brunzel, N.A. (2013). Fundamentals of Urine & Body Fluid Analysis (Third ed.). St. Louis, Missouri: Elsevier Saunders; 314, 316, 318-320.
  12. Levin, M.C. (2012, August). Neurologic Diagnostics Procedures. Retrieved from Merck Manual: