FIG 3. EACC with extension into the middle ear cavity. Coronal temporal bone CT shows a soft-tissue mass in the EAC, with inferior wall erosion (black arrow) and intramural bone fragments. There is extension beyond the tympanic membrane into the middle ear cavity (white arrow). Note preservation of the facial nerve canal and scutum in this 45-year-old man with otorrhea and hearing loss. Used with permission (24).