Related Experiment Video
Updated: Aug 16, 2026
Minimally Invasive Endoscopic Intracerebral Hemorrhage Evacuation
Published on: October 15, 2021
Management of chronic subdural hematoma in spontaneous intracranial hypotension
Manou Overstijns1, Amir El Rahal1, Katharina Wolf1
1Department of Neurosurgery, Medical Center University of Freiburg, Freiburg im Breisgau, Germany.
Insights
A management algorithm for chronic subdural hematoma (cSDH) in spontaneous intracranial hypotension (SIH) due to spinal CSF leaks is proposed. Treating the spinal leak first is safe for asymptomatic patients with small cSDH, while symptomatic patients require immediate hematoma evacuation.
Area of Science:
- Neurosurgery
- Neurology
- Radiology
Background:
- Spinal cerebrospinal fluid (CSF) leaks cause spontaneous intracranial hypotension (SIH), often leading to chronic subdural hematoma (cSDH).
- No established management algorithm exists for cSDH in SIH patients, necessitating clinical guidance.
Purpose of the Study:
- To analyze the characteristics of cSDH in SIH patients.
- To develop a practical management algorithm for cSDH associated with spinal CSF leaks.
Main Methods:
- Retrospective cohort study of 272 SIH patients undergoing spinal CSF leak closure (April 2018-April 2024).
- Analysis of demographics, leak types, treatments, cSDH characteristics, prevalence, and risk factors.
Main Results:
- 31% of SIH patients (85/272) had cSDH, predominantly bilateral.
- Male sex and age >70 were significant risk factors for cSDH.
- Treating the spinal leak first was effective for asymptomatic cSDH ≤10mm; symptomatic cSDH required evacuation.
Conclusions:
- A
- leak first
- strategy is safe for asymptomatic cSDH ≤10mm.
- A
- subdural first
- strategy is mandatory for symptomatic cSDH.
- Spinal leak closure is the causal treatment for cSDH, with a near-zero recurrence rate.
Introduction:
There is no accepted algorithm for the management of chronic subdural hematoma (cSDH) caused by spinal CSF leaks in spontaneous intracranial hypotension (SIH).
Research Question:
This study analyses characteristics of cSDH in SIH to establish a practicable management algorithm.
Material And Methods:
This retrospective cohort study included all patients with spinal CSF leak closure from April 2018 to April 2024. Demographics, leak type, treatment modalities, as well as cSDH characteristics, prevalence, and risk factors were analyzed.
Results:
Among 272 SIH patients, 85 (31 %) concomitantly had cSDH, predominantly bilateral (88 %). Hematoma width ranged from 2 to 30 mm. cSDH prevalence was highest in CSF-venous fistulas (43 %), followed by ventral (31 %) and lateral leaks (22 %). Male sex (OR = 4; p < 0.001) and age >70 years (OR = 6; p = 0.008) were significant risk factors. Surgical evacuation was performed in 23 patients, with symptoms attributable to cSDH in 17/23 patients. The biggest cSDH without surgical treatment was 20 mm. No neurological deterioration occurred during diagnostics or treatment of CSF leaks. After leak closure, no cSDH, regardless of initial size or previous treatment, required additional treatment, and no recurrence occurred in the 3-month follow-up.
Discussion And Conclusion:
Primary localization and targeted treatment of the spinal leak is safe in asymptomatic patients and cSDH ≤10 mm ("leak first" strategy). Immediate evacuation of the cSDH is mandatory in symptomatic patients ("subdural first" strategy). We consider the CSF leak closure as a causal treatment for cSDH resulting in a markedly low, close to zero, recurrence rate. Prospective validation of these findings is needed.
