case_images: PMC10798166_01
case_images: Enlargement of the tympanic segment of the fallopian canal (arrow) on axial CT scan of the left temporal bone (A) and intense contrast-enhancement (arrow) surrounding the facial nerve (arrowhead) on axial gadolinium-enhanced T1-weighted imaging (B).
case_images: jbsr-108-1-3361-g1.jpg
case_images: PMC10798166_01_jbsr-108-1-3361-g1.jpg
case_images: F1
case_images: Non-contrast computed tomography (CT) of the left temporal bone was performed, showing an enlargement of the tympanic segment of the fallopian canal (Figure 1A). Intense contrast enhancement surrounding the tympanic segment of the facial nerve was noted on gadolinium-enhanced spin echo based T1-weighted images, indicating congestion of the venous plexus surrounding the embedded facial nerve (Figure 1B).
case_images: Axial CT scan showing the PSA on the cochlear promontory.
case_images: jbsr-108-1-3361-g2.jpg
case_images: PMC10798166_01_jbsr-108-1-3361-g2.jpg
case_images: F2
case_images: A closer look to the scan revealed a small vessel running over the middle ear promontory which led to the diagnosis of a PSA (Figure 2).
case_images: Axial CT scan showing the absence of the left foramen spinosum.
case_images: jbsr-108-1-3361-g3.jpg
case_images: PMC10798166_01_jbsr-108-1-3361-g3.jpg
case_images: F3
case_images: In addition, CT demonstrated an agenesis of the left foramen spinosum (Figure 3).