- 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 abscess is coalescent mastoiditis, osteomyelitis of squamosal temporal bone, extracranial abscess, inframastoid abscess deep to sternocleidomastoid muscle + trapezius
Radiology Cases of Acute Mastoiditis

Radiology Cases of Coalescent Mastoiditis

Radiology Cases of Acute Mastoiditis with Bezold Abscess

Radiology Cases of Acute Mastoiditis with Sinogenic Abscess

Radiology Cases of Acute Mastoiditis with Dural Venous Sinus Thrombosis
