Neoplastic causes of perilabyrinthine fistula.

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Presentation transcript:

Neoplastic causes of perilabyrinthine fistula. Neoplastic causes of perilabyrinthine fistula. A, Squamous cell carcinoma. Axial CT scan shows destructive soft tissue filling the middle ear and eroding through the otic capsule (arrow). B, Facial nerve venous malformation. Axial CT scan shows a lobulated soft-tissue density extending from the geniculate ganglion (white arrow) through the otic capsule and into the superior semicircular canal (black arrow). M.-L. Ho et al. AJNR Am J Neuroradiol 2017;38:2-9 ©2017 by American Society of Neuroradiology