Gradenigo’s Syndrome and Bacterial Meningitis in a Patient with a Petrous Apex Cholesterol Granuloma

<div>(a) Axial diffusion-weighted image (DWI). (b) Apparent diffusion coefficient image (ADC): heterogeneously restricted diffusion (increased signal on DWI and decreased signal on ADC) in the petrous apex lesion, likely reflecting viscous fluid. Simple cholesterol granulomas typically show decreased DWI signal.</div>

Case Reports in Infectious Diseases

fig4

Figure 4

Figure 4: Gradenigo’s Syndrome and Bacterial Meningitis in a Patient with a Petrous Apex Cholesterol Granuloma 