Arteriovenous malformations in the posterior fossa

Area of Science:

• Neurosurgery
• Vascular Neurology

Background:

• Posterior fossa arteriovenous malformations (AVMs) present unique surgical challenges.
• Understanding lesion location is critical for surgical planning.

Purpose of the Study:

• To review surgical outcomes for posterior fossa AVMs.
• To analyze the distribution of AVMs within the posterior fossa.

Main Methods:

• Retrospective review of 12 surgical cases of posterior fossa AVMs operated on since 1968.
• Detailed documentation of lesion location (cerebellum, cerebellopontine angle, brain stem involvement).
• Description of surgical approach, including transtentorial occipital for anterior cerebellar AVMs.

Main Results:

• 12 of 14 AVM cases were surgically treated.
• Lesions were predominantly in the cerebellum (10 cases) with specific locations noted.
• Two cases involved the cerebellopontine angle, and two had brain stem relation.
• One surgical death was recorded.

Conclusions:

• Surgical management of posterior fossa AVMs is feasible but carries risks.
• Cerebellar and cerebellopontine angle AVMs require tailored surgical strategies.
• The transtentorial occipital approach is utilized for specific anterior cerebellar AVM locations.