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AJNR - American Journal of Neuroradiology

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Neurosyphilis as a Cause of Facial and Vestibulocochlear Nerve Dysfunction: MR Imaging Features

Michelle M. Smith^a and James C. Anderson^a

^a From the Department of Radiology (M.M.S.), Froedtert Memorial Lutheran Hospital, Medical College of Wisconsin, Milwaukee, WI, and the Department of Radiology (J.C.A.), Vanderbilt University Medical Center, Nashville, TN.

View larger version (132K): [in a new window]   fig 1. Axial T1-weighted MR image (450/15/4), obtained after the administration of contrast medium, shows enhancement within the cisternal segment of the vestibulocochlear nerve complex on the right (curved open arrow), within both internal auditory canals, within the left cochlea (curved solid arrow), and within the tympanic portion of the right facial nerve (small arrow). The enhancement within the internal auditory canals involves both the nerves within the CSF and the meninges lining the canal. Enhancement is also seen within the middle turn of the right cochlea. fig 2. Axial T1-weighted MR image (450/15/4), obtained after the administration of contrast medium from a position that is slightly superior to that of figure 1, shows enhancement of the labyrinthine and geniculate portions of the right facial nerve (large arrow) and enhancement of the meninges lining both internal auditory canals (small arrows). Enhancement of the intracanalicular segments of the seventh and eighth cranial nerve complex is appreciated bilaterally