: Lysozyme, Cerebrospinal Fluid, Mass Concentration

: What Is Lysozyme?

: Lysozyme is an enzyme found in many body fluids and produced by certain white blood cells. It helps break down bacterial cell walls and is part of the body's innate immune defense. Because it comes from immune cells, its level can rise when those cells are active in an area of inflammation.

: Why Measure It in Cerebrospinal Fluid?

: Cerebrospinal fluid is collected through a lumbar puncture (spinal tap) and reflects conditions in the space around the brain and spinal cord. Measuring lysozyme in this fluid can provide clues about immune-cell activity in the central nervous system, and it is typically ordered as an adjunct to other CSF tests rather than on its own.

: How the Test Is Done

: A cerebrospinal fluid sample is obtained by a clinician during a lumbar puncture. The fluid is sent to the laboratory, where the lysozyme mass concentration is measured, typically by an immunoassay technique. The result is reported as a concentration in the fluid.

: How Results Are Used

: Your clinician interprets the CSF lysozyme level together with the appearance and cell counts of the fluid, protein and glucose levels, microbiology results, and your symptoms. No single value is diagnostic by itself, so it is considered in the context of the overall evaluation.