Skip Navigation LinksHome > January/February 2013 - Volume 37 - Issue 1 > Spontaneous Temporomandibular Joint Herniation Into the Exte...
Journal of Computer Assisted Tomography:
doi: 10.1097/RCT.0b013e318272ef04
Neuroradiology

Spontaneous Temporomandibular Joint Herniation Into the External Auditory Canal Through a Persistent Foramen Tympanicum (Huschke): Radiographic Features

Nakasato, Tatsuhiko MD, PhD*; Nakayama, Tetsuo MD, PhD*; Kikuchi, Koyo MD*; Ehara, Shigeru MD, PhD*; Ohtsuka, Hisashi MD, PhD; Fukuda, Koji MD, PhD; Sato, Hiroaki MD, PhD

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Abstract

Abstract: Persistent foramen tympanicum (Huschke) is an anatomical variation located in the anteroinferior portion of the external auditory canal. We present a case of symptomatic temporomandibular joint (TMJ) herniation into the external auditory canal though an enlarged osseous defect. The herniated retrodiscal TMJ tissue moved backward when the patient’s mouth was closed, and forward, when opened. Magnetic resonance imaging findings were useful for differentiating TMJ herniation from salivary fistula caused by an ectopic salivary gland.

© 2013 Lippincott Williams & Wilkins, Inc.

  

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