E4634. Teeing It Up: Case-based Review of Temporal Bone Pathology and Variant Anatomy
  1. Peter Wang; UC Irvine Medical Center
  2. Scott Refugio; UC Irvine Medical Center
  3. David Floriolli; UC Irvine Medical Center
  4. Charles Li; UC Irvine Medical Center
  5. David Fussell; UC Irvine Medical Center
  6. Daniel Chow; UC Irvine Medical Center
  7. Edward Kuoy; UC Irvine Medical Center
The temporal bone is a complex site housing multiple structures essential for balance and hearing. Knowledge of normal and variant anatomy is key to recognizing the various pathologies that can occur and the clinical ramifications.

Educational Goals / Teaching Points
The goal of this exhibit is to provide a strong foundation of normal anatomy of the temporal bone and physiology of the structures it contains. This will assist the reader in understanding the differentiating imaging and clinical features of anatomic variants, congenital anomalies/malformations, and other various pathologies of the temporal bone.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
The educational exhibit will provide an overview of normal CT and MRI anatomy of the temporal bone and its structures with emphasis on the middle and inner ears. Following this, there will be a case-based review of multiple congenital anomalies/malformations, anatomic variants, and various pathologies. Congenital anomalies/malformations will include rudimentary otocyst, common cavity, cochlear aperture stenosis, and dehiscent jugular bulb with communication with vestibular aqueduct. Anatomic variants will include incudal hole and high riding jugular bulb. Finally, additional pathologies such as eagle syndrome, osteomyelitis, Ramsay hunt syndrome, and meningiomatosis with SMARCB1 mutation will be featured.

Understanding of normal and variant anatomy of the temporal bone is essential in correctly identifying various pathologies and providing meaningful interpretations to the clinical team for appropriate treatment management.