Complication of partial stylohyoidectomy for treatment of temporohyoid osteoarthropathy and an alternative surgical technique in three cases

Pease, Anthony P.; Biervliet, Jérôme Van; Dykes, Nathan L.; Divers, Thomas J.; Ducharme, Norm G.

doi:10.2746/0425164044877413

Cited by 51 publications

(86 citation statements)

References 5 publications

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“…Fusion of the temporohyoid joint alters biomechanical forces in horses with THO resulting in remodeling of adjacent bony structures and secondary alteration of contained soft tissue structures. Therefore, releasing this abnormal mechanical force through surgical intervention could prevent further alteration of bony and soft tissue structures . This might explain the observed better outcome in horses undergoing surgery versus medical treatment.…”

Section: Discussionmentioning

confidence: 59%

“…Clinicians and surgeons must be aware of this pre‐existing concurrent finding if surgical management is considered in horses with THO. Ceratohyoid ostectomy has been reported to be technically easier than stylohyoid ostectomy . Further, CHO presents a low risk of bony regrowth of the ostectomy site and minimizes potential complications such as damaging the glossopharyngeal and other nerves …”

Section: Discussionmentioning

confidence: 99%

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Neurologic Deficits Including Auditory Loss and Recovery of Function in Horses with Temporohyoid Osteoarthropathy

Aleman

Spriet

Williams

et al. 2015

Veterinary Internal Medicne

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BackgroundAuditory loss is a common deficit in horses with temporohyoid osteoarthropathy (THO), however, recovery of function is unknown.Hypothesis/ObjectivesTo investigate neurologic function with emphasis in audition in horses with THO after treatment. To describe anatomical alterations of the petrous temporal bone that might result in auditory loss.AnimalsTwenty‐four horses with a clinical diagnosis of THO.MethodsProspective study. A brainstem auditory evoked response (BAER) study was done as part of the criteria for inclusion in horses with a clinical diagnosis of THO from the years of 2005 to 2014. Physical and neurologic status and BAER findings were recorded. Brainstem auditory evoked response variables were compared by using Wilcoxon sign test. Fisher's exact test was also used. Significance was set at P < 0.05.ResultsThe most common signs included auditory loss (100% of horses), vestibular and facial nerve dysfunction (83%), and exposure ulcerative keratitis (71%). Concurrent left laryngeal hemiparesis was observed in 61% of horses through endoscopy. Auditory dysfunction was bilateral in 50% of the cases (complete and partial), and unilateral affecting more commonly the right ear (R = 8, L = 4). Short‐ and long‐term follow‐up revealed persistent auditory loss in all horses based on abnormal response to sound, and further confirmed through a BAER in 8 horses.Conclusions and Clinical ImportanceAuditory dysfunction appears to be a permanent neurologic deficit in horses diagnosed with THO despite overall neurologic improvement.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Neurologic Deficits Including Auditory Loss and Recovery of Function in Horses with Temporohyoid Osteoarthropathy

Aleman

Spriet

Williams

et al. 2015

Veterinary Internal Medicne

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“…32,35 Presumptive diagnosis is made through a combination of typical signalment, history, and signs of CN VII and VIII dysfunction. 37 Both medical and surgical therapies exist for the treatment of temporohyoid osteoarthropathy. 36 Rarely CN IX and X also may be involved.…”

Section: Temporohyoid Osteoarthropathymentioning

confidence: 99%

Disorders of the Face, Tongue, Esophagus, Larynx, and Ear

Lorenz

2011

Handbook of Veterinary Neurology

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“…Temporal bone fracture may be suspected with a wide range of clinical signs including headshaking, facial nerve deficits (facial paresis or paralysis, asymmetric position of the ears, eyelids, lips or nose, drooling), vestibulocochlear nerve deficits (nystagmus, head tilt, strabismus, imbalance), dysphagia, ataxia, seizures, lethargy, or death. [1][2][3][4][5][6] Clinical signs result from compression by local hemorrhage or stretching and tearing of the facial nerve (CN7) or vestibulocochlear nerve (CN8), which are contained within the temporal bone. Most commonly, temporal bone fractures are diagnosed by radiography or during postmortem examination.…”

mentioning

confidence: 99%

Computed Tomography of Temporal Bone Fractures and Temporal Region Anatomy in Horses

Pownder¹,

Scrivani²,

Bezuidenhout

et al. 2010

Journal of Veterinary Internal Medicine

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Background: In people, specific classifications of temporal bone fractures are associated with clinical signs and prognosis. In horses, similar classifications have not been evaluated and might be useful establishing prognosis or understanding pathogenesis of certain types of trauma.Hypothesis/Objectives: We hypothesized associations between temporal bone fracture location and orientation in horses detected during computed tomography (CT) and frequency of facial nerve (CN7) deficit, vestibulocochlear nerve (CN8) deficit, or temporohyoid osteoarthropathy (THO). Complex temporal region anatomy may confound fracture identification, and consequently a description of normal anatomy was included.Animals: All horses undergoing temporal region CT at our hospital between July 1998 and May 2008. Methods: Data were collected retrospectively, examiners were blinded, and relationships were investigated among temporal bone fractures, ipsilateral THO, ipsilateral CN7, or ipsilateral CN8 deficits by Chi-square or Fischer's exact tests. Seventy-nine horses had CT examinations of the temporal region (158 temporal bones).Results: Sixteen temporal bone fractures were detected in 14 horses. Cranial nerve deficits were seen with fractures in all parts of the temporal bone (petrosal, squamous, and temporal) and, temporal bone fractures were associated with CN7 and CN8 deficits and THO. No investigated fracture classification scheme, however, was associated with specific cranial nerve deficits.Conclusions and Clinical Importance: Without knowledge of the regional anatomy, normal structures may be mistaken for a temporal bone fracture or vice versa. Although no fracture classification scheme was associated with the assessed clinical signs, simple descriptive terminology (location and orientation) is recommended for reporting and facilitating future comparisons.

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Complication of partial stylohyoidectomy for treatment of temporohyoid osteoarthropathy and an alternative surgical technique in three cases

Cited by 51 publications

References 5 publications

Neurologic Deficits Including Auditory Loss and Recovery of Function in Horses with Temporohyoid Osteoarthropathy

Neurologic Deficits Including Auditory Loss and Recovery of Function in Horses with Temporohyoid Osteoarthropathy

Disorders of the Face, Tongue, Esophagus, Larynx, and Ear

Computed Tomography of Temporal Bone Fractures and Temporal Region Anatomy in Horses

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