Dehiscent temporomandibular joint

Radiology. 1991 Jul;180(1):211-3. doi: 10.1148/radiology.180.1.2052697.


The appearance of an acute effusion in a well-pneumatized temporal bone directs attention to the nasopharynx and skull base. Two patients are described in whom dehiscence of the temporomandibular joint allowed herniation of the contents of the joint posteromedically, where they obstructed the middle ear entrance of the eustachian tube, the protympanum. This is, to the authors' knowledge, a previously unreported cause of an acute middle ear and mastoid effusion.

Publication types

  • Case Reports

MeSH terms

  • Adolescent
  • Ear Canal / diagnostic imaging
  • Ear, Middle / diagnostic imaging
  • Eustachian Tube / diagnostic imaging
  • Female
  • Humans
  • Mandible / diagnostic imaging
  • Mastoid / diagnostic imaging
  • Middle Aged
  • Otitis Media with Effusion / etiology
  • Temporomandibular Joint Disorders / complications
  • Temporomandibular Joint Disorders / diagnostic imaging*
  • Tomography, X-Ray Computed