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Lymphocytic pleocytosis is an abnormal increase in the amount of lymphocytes in the cerebrospinal fluid (CSF). It is usually considered to be a sign of infection or inflammation within the nervous system , and is encountered in a number of neurological diseases , such as pseudomigraine, Susac's syndrome, and encephalitis.
Chronic meningitis is defined by signs and symptoms being present longer than four weeks and includes pleocytosis, or the presence of inflammatory cells in the cerebrospinal fluid. [2] The initial test is usually a lumbar puncture to collect cerebrospinal fluid for analysis.
Cancer slope factors (CSF) are used to estimate the risk of cancer associated with exposure to a carcinogenic or potentially carcinogenic substance. A slope factor is an upper bound, approximating a 95% confidence limit, on the increased cancer risk from a lifetime exposure to an agent by ingestion or inhalation.
Lymphocytic choriomeningitis (LCM) is "a viral infection of the membranes surrounding the brain and spinal cord and of the cerebrospinal fluid". [3] The name is based on the tendency of an individual to have abnormally high levels of lymphocytes during infection.
This fluid, which normally surrounds the brain and spinal cord, is then analyzed for signs of infection. [22] CSF findings that suggest a viral cause of meningitis include an elevated white blood cell count (usually 10-100 cells/μL) with a lymphocytic predominance in combination with a normal glucose level. [23]
Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. [3] [4] Cancer can be difficult to diagnose because its signs and symptoms are often nonspecific, meaning they may be general phenomena that do not point directly to a specific disease process.
metapneumovirus (hMPV) infection; necrotizing enterocolitis; neonatal conjunctivitis; parainfluenza (PIV) infection; pertussis; poliomyelitis; prenatal Listeria; Group B streptoccus infection; Tay–Sachs disease; tetanus; Ureaplasma urealyticum infection; respiratory Syncytial Virus infection; rhinovirus; common cold
A subdural hygroma (SDG) is a collection of cerebrospinal fluid (CSF), without blood, located under the dural membrane of the brain. Most subdural hygromas are believed to be derived from chronic subdural hematomas. They are commonly seen in elderly people after minor trauma but can also be seen in children following infection or trauma.