Radioanatomic Assessment of the Geniculate Ganglion Dehiscence and Dimension: A Cadaveric Study

Hamzaoğlu, Vural; Beğer, Orhan; Erdoğan, Osman; Kara, Engin; Vayısoğlu, Yusuf; Taghipour, Pourya; Özalp, Hakan; Karataş, Derya; Avcı, Emel; Dağtekin, Ahmet; Bağdatoğlu, Celal; Öztürk, Ahmet Hakan; Talaş, Derya Ümit

doi:10.1016/j.wneu.2019.11.036

Cited by 3 publications

(5 citation statements)

References 30 publications

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“…One such example is the dehiscence of GG, which may leave the GG vulnerable to damage during elevation of the dura mater. 15 Additionally, the anatomical relationship between the arcuate eminence and the superior semicircular canal may also be variable. Therefore, localizing the superior semicircular canal with reference to the arcuate eminence may not be reliable in some cases.…”

Section: Discussionmentioning

confidence: 99%

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Reliability of Neuronavigation in Localizing the Internal Acoustic Canal during Middle Fossa Approach

Kartum,

Kucukyuruk,

Kaya

et al. 2023

J Neurol Surg B Skull Base

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Objective: The absence of precise landmarks in the middle fossa floor and frequent anatomical variations make it difficult to localize the internal acoustic canal (IAC) during the middle fossa approcah (MFA). We aimed to investigate the reliability and utility of the neuronavigation system (NNS) in the MFA and to delineate specific technical considerations regarding NNS during the approach. Method: 1 mm thin-section computed tomography scans were performed on five formalin-fixed human cadavers (ten sides). During the MFA, structures, such as the IAC, vestibule and cochlea hidden in the temporal bone were investigated under NNS guidance. Results: All of the superficial landmarks, such as the foramen spinosum and ovale were correctly localized by NNS. Deeper landmarks, such as the central part of the IAC lying beneath the surface of the petrous apex could not be localized via NNS. The exact area of bone removal along roof of IAC was determined by using the orientation provided by the probe placed between the basal turn of cochlea and the vestibule. We were able to validate the location of the IAC via a medial to lateral drilling by using the navigation this reference point. Conclusion: The NNS can be used effectively during the MFA and localizing superficial landmarks on the middle fossa floor with a higher accuracy may prove helpful in identifying the IAC from above. By referring to the cochlea-vestibule junctional area the exact location of the trace of the IAC can be revealed. Keywords: middle fossa approach, internal acoustic canal, neuronavigation, petrous

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Section: Discussionmentioning

confidence: 99%

“…All these methods are solely based on constant anatomical landmarks and may not be reliable in case of anatomical variability. One such example is the dehiscence of GG, which may leave the GG vulnerable to damage during elevation of the dura mater 15 .…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Reliability of Neuronavigation in Localizing the Internal Acoustic Canal during Middle Fossa Approach

Kartum,

Kucukyuruk,

Kaya

et al. 2023

J Neurol Surg B Skull Base

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“…The first step was to identify all 12 pairs of the ganglia of the cranial nerves: the ciliary ganglion, trigeminal ganglion, pterygopalatine ganglion, otic ganglion, submandibular ganglion, geniculate ganglion, vestibular ganglion, spiral ganglion, superior and inferior glossopharyngeal ganglia, and superior and inferior vagal ganglia (Table 1) [12][13][14][15][16][17][18][19][20][21][22][23]. For this, sectioned images of the brainstem were examined to determine the origins of the cranial nerves (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The geniculate ganglion can be injured during surgical interventions such as the transmastoid approach, translabyrinthine approach, and middle cranial fossa approach due to abnormalities such as tumors [14].…”

Section: Geniculate Ganglionmentioning

confidence: 99%

Identification of cranial nerve ganglia using sectioned images and three-dimensional models of a cadaver

2022

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Background: Cranial nerve ganglia, which are prone to viral infections and tumors, are located deep in the head, so their detailed anatomy is difficult to understand using conventional cadaver dissection. For locating the small ganglia in medical images, their sectional anatomy should be learned by medical students and doctors. The purpose of this study is to elucidate cranial ganglia anatomy using sectioned images and three-dimensional (3D) models of a cadaver. Methods: One thousand two hundred and forty-six sectioned images of a male cadaver were examined to identify the cranial nerve ganglia. Using the real color sectioned images, real color volume model having a voxel size of 0.4 × 0.4 × 0.4 mm was produced. Results: The sectioned images and 3D models can be downloaded for free from a webpage, anatomy.dongguk.ac.kr/ganglia. On the images and model, all the cranial nerve ganglia and their whole course were identified. In case of the facial nerve, the geniculate, pterygopalatine, and submandibular ganglia were clearly identified. In case of the glossopharyngeal nerve, the superior, inferior, and otic ganglia were found. Thanks to the high resolution and real color of the sectioned images and volume models, detailed observation of the ganglia was possible. Since the volume models can be cut both in orthogonal planes and oblique planes, advanced sectional anatomy of the ganglia can be explained concretely. Conclusions: The sectioned images and 3D models will be helpful resources for understanding cranial nerve ganglia anatomy, for performing related surgical procedures.

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“…It is, however, an invasive approach which requires craniotomy and temporal lobe retraction, with the risk of postoperative complications such as seizures, intracranial bleeding, postoperative SCF leak and accidental damage of the ossicular chain 11 . Iatrogenic injury to the geniculate ganglion has been also described during this approach, in case of a dehiscent geniculate ganglion 12 . The trans-mastoid approaches (TMA) to the geniculate ganglion area have been developed as less invasive alternative to the MCFA.…”

Section: Introductionmentioning

confidence: 99%

Suprameatal–transzygomatic root endoscopic approach to the geniculate ganglion: an anatomical and radiological study

Fernandez

Fermi

Presutti

2021

Eur Arch Otorhinolaryngol

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Radioanatomic Assessment of the Geniculate Ganglion Dehiscence and Dimension: A Cadaveric Study

Cited by 3 publications

References 30 publications

Reliability of Neuronavigation in Localizing the Internal Acoustic Canal during Middle Fossa Approach

Reliability of Neuronavigation in Localizing the Internal Acoustic Canal during Middle Fossa Approach

Identification of cranial nerve ganglia using sectioned images and three-dimensional models of a cadaver

Suprameatal–transzygomatic root endoscopic approach to the geniculate ganglion: an anatomical and radiological study

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