• Vural Hamzaoğlu, Orhan Beger, Osman Erdoğan, Engin Kara, Yusuf Vayisoğlu, Pourya Taghipour, Hakan Özalp, Derya Karataş, Emel Avcı, Ahmet Dağtekin, Celal Bağdatoğlu, Ahmet Hakan Öztürk, and Derya Ümit Talas.
• Mersin University Faculty of Medicine, Department of Neurosurgery, Mersin, Turkey.
• World Neurosurg. 2020 Feb 1; 134: e913-e919.

ObjectiveThe main aim of this study placed on cadavers was to compare the data related to geniculate ganglion (GG) dehiscence and dimension obtained from computed tomography (CT) with dissection values.MethodsThis study was conducted on 20 temporal bones obtained from 10 cadavers (4 female, 6 male) aged between 45 and 92 (71.50 ± 15.98) years. All the measurements related to GG dimension were performed with a CT scanner and microdissection.ResultsThe size of GG including its area, length, and width did not show statistically significant differences in terms of sex, side, and assessment method (CT and cadaveric dissections). The dehiscent GG was observed in 6 (30%) and 5 (25%) out of 20 temporal bones in CT and cadaveric dissections, respectively. The presence and absence of GG dehiscence in CT and dissection were similar in 75%.ConclusionsOur findings based on dissection data suggest that radiologic evaluation of dehiscent GG detection might be erroneous by 25%, which highlights that surgeons should be careful when lifting the dura to prevent GG injury during middle cranial fossa surgical approaches. On the other hand, there was no statistical difference between CT and dissection measurements related to GG dimension.Copyright © 2019 Elsevier Inc. All rights reserved.

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