A Case of Inverted Papilloma Originating from the Middle Ear and Review of the Literature

Figure 3

Coronal section of temporal bone CT. A mass obliterates the outer ear pathway and destroys the mastoid cells and mastoid antrum. The mass extends to the middle ear. The mass was caused by ossicular chain and tegmen tympani defects. White arrow: Tegmen tympani defect. Black arrow: defect in superficial semicircular canal.