ARRS 2022 Abstracts

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E1479. Lesions of the Posterior Skull Base Foramina: A Hole-istic Review
Authors
  1. Shreya Patel; NewYork Presbyterian - Columbia University
  2. Amy Juliano; Massachusetts Eye and Ear/Harvard Medical School
  3. Gul Moonis; NewYork Presbyterian - Columbia University
Background
The posterior skull base is comprised of the occipital bone and petrous temporal bone. Three major foramina traverse the posterior skull base, the jugular foramen, foramen magnum, and hypoglossal canal. Many disease processes can involve these foramina, either originating within or extending into them.

Educational Goals / Teaching Points
In this case-based educational exhibit we will show the imaging findings of common and uncommon posterior skull base foraminal lesions. We will also discuss relevant clinical considerations, provide a framework to guide the differential diagnosis, and outline follow-up recommendations for indeterminate lesions.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
The exhibit includes a review of anatomy of the posterior skull base and foramina and cases of posterior skull base foraminal lesions (foramen magnum: benign enhancing foramen magnum lesion, meningioma, schwannoma, aneurysm, brainstem tumors, Chiari malformation, intracranial hypotension; jugular foramen: paragangliomas including glomus jugularis/jugulotympanicum, schwannoma, meningioma, meningocele, neurosarcoidosis, jugular bulb diverticulum, jugular bulb pseudolesion, high riding jugular bulb, dehiscent jugular bulb; and hypoglossal canal: schwannoma, persistent hypoglossal artery, craniocervical junction juxta-articular cyst, dural arteriovenous fistula). The exhibit also includes relevant clinical considerations, imaging pearls and pitfalls, and management/follow up recommendations for indeterminate lesions.

Conclusion
After the reader has viewed the case-based exhibit, they will be able to recognize both common and uncommon posterior skull base foraminal lesions and effectively narrow their differential diagnosis via the provided framework.