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Postmortem cerebrospinal fluid pleocytosis
Insights
Postmortem cerebrospinal fluid (CSF) pleocytosis is common in infants and adults. Sudden infant death cases show higher CSF cell counts, primarily lymphocytes and macrophages, before 12 hours postmortem.
Area of Science:
- Forensic pathology
- Neuropathology
- Immunology
Background:
- Cerebrospinal fluid (CSF) analysis is crucial in diagnosing neurological conditions.
- Understanding postmortem changes in CSF is vital for interpreting forensic findings.
Purpose of the Study:
- To investigate the occurrence and characteristics of postmortem cerebrospinal fluid (CSF) pleocytosis.
- To determine the cellular composition and identify factors influencing CSF changes after death.
Main Methods:
- Collection of postmortem CSF and ventricular fluid from pediatric and adult cases.
- Cell counting and morphological characterization using histochemical markers.
- Analysis of cell types, including lymphocytes and macrophages, in relation to postmortem interval.
Main Results:
- Postmortem CSF pleocytosis is a frequent finding, particularly pronounced in infants.
- Sudden infant death cases exhibit elevated CSF cell counts.
- Identifiable cells are mononuclear, predominantly lymphocytes (60-70%) and macrophages (20-40%).
- Cellular morphology degrades and identification becomes impossible after 12 hours postmortem.
Conclusions:
- Postmortem CSF pleocytosis is a common physiological response.
- The cellular profile suggests an inflammatory or immune response.
- Further research is needed to elucidate the etiology of postmortem CSF pleocytosis.
Abstract:
We show that postmortem cerebrospinal fluid (CSF) pleocytosis is a common event. Postmortem cerebrospinal or ventricular fluid was obtained from children and adults. The cells were counted and morphologically characterized using several histochemical markers. Infants exhibit a brisk postmortem CSF pleocytosis. Sudden infant death cases have relatively high CSF counts. Typeable cells are mononuclear and consist of approximately 60%-70% lymphocytes and 20%-40% macrophages. When postmortem duration is greater than 12 h, the cells become vacuolated and cannot be identified. The etiology of these findings requires further study.