|
FIG 2. CT scans obtained 2 months later.
A, Contrast-enhanced axial CT scan shows a well-defined approximately 2-cm mass (arrow) along the anterosuperior aspect of the left petrous pyramid. Anteriorly, it is in continuity with the cavernous sinus.
B, High-spatial-resolution axial CT scan (bone window) shows widening of the left facial nerve canal in the region of the geniculate ganglion (arrow). Opacification of the mastoid air cells by serous fluid is also noted, probably secondary to blockage of the eustachian tube by the petrous apex mass.
C, Coronal CT scan, obtained at the level of the cochlea, shows extension of the soft tissue mass into the left middle ear cavity. Erosion of the facial nerve canal at the geniculate ganglion (arrow) is seen.
|