case_images: PMC10746357_01
case_images: Initial computed tomography scan showing right bony thickening, sclerosis, and expansion centered around right posterior petrous temporal bone with extension into the posterior external auditory canal with central lucent structure. There is compression of the right posterior fossa.
case_images: CRIOT2023-6652012.001.jpg
case_images: PMC10746357_01_CRIOT2023-6652012.001.jpg
case_images: fig1
case_images: A CT head demonstrated an expansile bony mass of the right posterior temporal bone measuring 4.7 x 5.0 x 5.7 cm with a central fluid-filled cavity (Figure 1).
case_images: Magnetic resonance imaging in T1 (a), T2 (b), and T2 flair (c) sequencing showing bony expansion and sclerosis of the right temporal bone, fluid within this expansion, and mass effect involving the posterior fossa.
case_images: CRIOT2023-6652012.002.jpg
case_images: PMC10746357_01_CRIOT2023-6652012.002.jpg
case_images: fig2
case_images: An MRI was obtained (Figure 2) which demonstrated significant cerebellar compression and tonsillar herniation through the foramen magnum; a lack of cerebral edema indicated that this was likely a chronic finding.
case_images: Preoperative audiometric evaluation (a) showing right moderate conductive hearing loss. Postoperative audiometric evaluation (b) showing normal right hearing thresholds.
case_images: CRIOT2023-6652012.003.jpg
case_images: PMC10746357_01_CRIOT2023-6652012.003.jpg
case_images: fig3
case_images: Postoperatively, the patient's hearing improved (Figure 3) and testing revealed normal hearing thresholds in the right ear.