case_images: PMC5987328_01
case_images: T1-weighted Gd-MRI, axial image. x: symmetrical lineal diffuse thickening and enhancement of the dural layer of the IAC. i: left labyrinthine and tympanic facial nerve enhancement.
case_images: CRINM2018-2171434.001.jpg
case_images: PMC5987328_01_CRINM2018-2171434.001.jpg
case_images: fig1
case_images: We found in the T1-weighted, gadolinium-enhanced magnetic resonance imaging (Gd-MRI) diffuse dural and symmetrical enhancement of the dural layer of the posterior and middle fossae including the convexity and surprisingly the dural layer of the internal auditory canal (IAC) and the left labyrinthine and tympanic facial nerve (Figure 1).
case_images: Dura (haematoxylin and Eosin). Arrow: multinucleated giant cells associated with the small caliber vessel wall. Arrow: severe mononuclear infiltrate.
case_images: CRINM2018-2171434.002.jpg
case_images: PMC5987328_01_CRINM2018-2171434.002.jpg
case_images: fig2
case_images: The last finding could be proposed to be considered as pathognomonic sign of GPA (Figure 2).