What is polys in a cerebral spinal fluid lab test?

In a cerebrospinal fluid (CSF) lab test, "polys" refers to polymorphonuclear leukocytes, which are a type of white blood cell, primarily neutrophils. The presence and count of polys in CSF can indicate inflammation or infection, such as in cases of bacterial meningitis. Typically, a higher number of polys in the CSF is associated with acute infections, while lower levels may be seen in viral infections or other conditions. Evaluating polys alongside other CSF components helps in diagnosing neurological disorders.