A Rare Case of Endolymphatic Sac Tumour: Clinicopathologic Study and Surgical Management
Figure 2
CT imaging (a) with axial (b) and coronal (c) scans demonstrated an irregular, hypodense, and expansile lytic lesion of the mastoid process of the left petrous bone extending to involve both the left medial mastoid and the middle ear, with a subtotal erosion of ossicular chain and a partial bone destruction of the “tegmen tympani” (see arrows). The mass did not appear to affect the semicircular canals, the canal of the facial nerve, and the internal auditory canal.
