Outline five causes of cerebrospinal fluid pleocytosis?

1. Infection: One of the most common causes of cerebrospinal fluid pleocytosis is infection, such as bacterial, viral, or fungal meningitis. In these cases, the immune system responds to the infection by increasing the number of white blood cells in the cerebrospinal fluid.

2. Autoimmune disorders: Conditions such as multiple sclerosis or Guillain-Barre syndrome can cause inflammation in the central nervous system, leading to an increase in white blood cells in the cerebrospinal fluid.

3. Trauma: Head injuries or spinal cord injuries can cause inflammation and an increase in white blood cells in the cerebrospinal fluid as the body responds to the injury.

4. Tumors: Brain tumors or spinal cord tumors can cause an increase in white blood cells in the cerebrospinal fluid as the body tries to fight off the abnormal growth of cells.

5. Bleeding: Subarachnoid hemorrhage or other types of bleeding in the brain can lead to an increase in white blood cells in the cerebrospinal fluid as the body responds to the presence of blood in the central nervous system.

1. Meningitis (bacterial, viral, fungal)
2. Encephalitis
3. Subarachnoid hemorrhage
4. Intracranial tumors
5. Multiple sclerosis