Stapediovestibular Dislocation

Avulsion of malleoincudal complex with dislocation: A rare ossicular chain injury by using an indigenous claw-like ear hook with review of literature

“…[7,8] Traumatic ossicular lesion is usually associated with longitudinal fractures of temporal bone and is present in almost 20% of the cases of head trauma. [7,9] Hasso and Ledington [1] reported that up to 50% of temporal bone fractures are associated with ossicular injury.…”

“…The presence of the 'Y" sign on the coronal high resolution CT of the temporal bone shows lateral displacement of the incus. [8,14] Whereas, incudomalleolar articulation is well-visualized on axial CT scan and the configuration of this articulation is described as the "ice cream cone". [14] Displacement of the "ice cream cone" corresponds to the head of the malleus away from the cone (which resembles the body) and short process of incus, indicative of disarticulation.…”

Post-mortem changes of the middle ear: Multislice computed tomography study

“…There are five types of ossicular dislocation: incudostapedial joint separation, incudomalleolar joint separation, dislocation of the incus, dislocation of the malleoincudal complex, and stapediovestibular dislocation (the rarest). Incudostapedial joint separation is the most common post-traumatic abnormality of the ossicular chain because of the tenuous suspension of the incus between the firmly anchored malleus and stapes [8]. Fractures of the malleus, incus or stapes have been described but are uncommon [9].…”

Post traumatic deafness: a pictorial review of CT and MRI findings

“…Stapediovestibular luxations are rare lesions that are most commonly caused by direct and penetrating trauma to the external ear canal [ 19 , 20 ], though they have also be associated with incudomalleolar disarticulation and stapes fracture [ 21 ]. The footplate can also be dislocated in the tympanic cavity due to a traumatic force tearing the annular ligament via an increase in perilymphatic pressure (external dislocation) [ 22 ]. An annular ligament lesion may lead to a perilymphatic fistula (Fig.…”