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The critical clock - re-evaluating optimal timing of surgery for brainstem cavernous malformations
1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
International Journal of Surgery (London, England)
|August 22, 2025
Summary
Timely microsurgical intervention for brainstem cavernous malformations (BSCMs) after haemorrhage improves neurological outcomes. Delaying treatment beyond 42 days increases the risk of unfavourable results in BSCM patients.
Area of Science:
- Neurosurgery
- Neurology
- Vascular Malformations
Background:
- Brainstem cavernous malformations (BSCMs) frequently present with haemorrhage.
- The optimal timing for microsurgical intervention in haemorrhagic BSCMs is not well-defined.
- This uncertainty impacts clinical decision-making for managing these complex lesions.
Purpose of the Study:
- To investigate the relationship between the timing of microsurgical intervention and neurological outcomes in patients with haemorrhagic BSCMs.
- To provide evidence-based insights for optimizing treatment strategies in BSCM management.
- To analyze the impact of intervention timing on new haemorrhage rates and cranial nerve deficits.
Main Methods:
- A retrospective analysis of 293 patients with BSCMs who underwent microsurgery between March 2011 and January 2023.
- Patients were stratified into acute (≤21 days), subacute (22-42 days), and delayed (>42 days) intervention groups based on haemorrhage-to-treatment time.
- Logistic regression with restricted cubic splines and matching weight analysis were employed to compare outcomes, including unfavourable neurological outcomes (mRS > 2), new haemorrhages, and cranial nerve deficits.
Main Results:
- After matching, 186 patients were analyzed. Acute and subacute intervention groups showed significantly lower rates of unfavourable neurological outcomes compared to the delayed group (P<0.001 and P=0.007, respectively).
- Subacute intervention was associated with a reduction in cranial nerve deficits (adjusted OR, 0.76; P<0.001).
- No significant differences in new haemorrhage incidence were observed among the intervention timing groups.
Conclusions:
- Delayed microsurgical intervention for haemorrhagic BSCMs, particularly beyond 42 days post-haemorrhage, is linked to a higher risk of unfavourable neurological outcomes.
- Earlier intervention (acute or subacute) appears to be associated with better neurological recovery and fewer cranial nerve deficits.
- These findings support timely surgical management for haemorrhagic BSCMs to improve patient outcomes.
