FIG 3. CT scans obtained after chemotherapy and resolution of symptoms.

A, Axial CT scan shows resolution of mass, previously noted along the anterosuperior aspect of the left petrous pyramid.

B, Axial CT scan (bone window), obtained at the level of the cochlea, shows no mass within the middle ear cavity and clear mastoid air cells. The anterior portion of the left carotid canal is faintly seen, and this could represent a residual (erosive) change from the previously noted mass.