Central nervous system cavernous malformations: cross-sectional study assessing rebleeding risk after...

Area of Science:

• Neurology
• Neurosurgery
• Vascular Malformations

Background:

• Cavernous malformations (CMs) are vascular anomalies in the central nervous system.
• Recurrent bleeding from CMs poses significant risks to patients.

Purpose of the Study:

• To determine the 5-year risk of a third bleeding event in patients with central nervous system cavernous malformations.
• To identify factors influencing the risk of recurrent hemorrhage in CMs.

Main Methods:

• Retrospective analysis of patients with cerebral or spinal CMs treated between 2003 and 2021.
• Inclusion criteria: complete MRI, baseline characteristics, and history of two bleeding events. Exclusion: prior surgical removal.
• Kaplan-Meier and Cox regression analyses were used to assess the 5-year risk of a third hemorrhage.

Main Results:

• The cumulative 5-year risk of a third bleeding event was 66.7% for the entire cohort.
• Neurological deterioration occurred in 37% of patients after the third hemorrhage (p=0.019).
• Specific subgroups, including brainstem or familial CMs, showed even higher 5-year risks (up to 76.9%).

Conclusions:

• Patients with central nervous system cavernous malformations have a significantly elevated risk of a third bleeding event within 5 years after a second hemorrhage.
• A third hemorrhage is associated with a higher likelihood of neurological deterioration.
• These findings suggest that surgical treatment might be considered after a second bleeding event in CM patients.