- Etiology: most common complication of acute otitis media
- Imaging: opacification of mastoid air cells
- Complications:
— Coalescent mastoiditis is mastoiditis with osteomyelitis of mastoid tegmen which can cause epidural abscess and empyema / meningitis / cerebritis / abscess / sigmoid sinus thrombosis
— Bezold’s abscess is coalescent mastoiditis, osteomyelitis of squamosal temporal bone, extracranial abscess, inframastoid abscess deep to sternocleidomastoid muscle + trapezius
Pediatric Imaging 