Longitudinal Assessment of Protein Markers in the Cerebrospinal Fluid of Patients With Central Nervous System Involvement

In the context of adult pathology, research into biomarkers in cerebrospinal fluid (CSF) has already identified proteins that are commonly used for the early diagnosis of certain neurodegenerative diseases. However, the lack of data available in the literature on pediatric diseases has limited the use of biomarkers in routine practice in children. Importantly, our group has pioneered the establishment of CSF biomarkers in children (e.g., measurement of interferon alpha in CSF by ultra-sensitive digital ELISA), which will undoubtedly be used in routine clinical practice in the future. In light of these arguments, the establishment of a CSF biobank will have major clinical implications, given the rarity of the diseases treated and the number of patients followed.

Inclusion Criteria: 1. Patients with a neurological condition diagnosed by a physician requiring cerebrospinal fluid (CSF) collection, through: * Neurosurgical procedure (EVD, VP shunt, VSG shunt, tumor surgery, spinal surgery with dural opening, ELD); * Lumbar puncture (LP). 2. Patients who have (or whose legal guardians, where applicable, have) consented to the storage and reuse of residual biological samples collected during the course of care within the biological collection. Exclusion Criteria: 1\. Objection by the patient and/or the legal guardian, if the patient is a minor, to participation in the study.