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Localisation of the petrous internal carotid artery relative to the vidian canal on computed tomography: a case–control study evaluating the impact of petroclival chondrosarcoma
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Localisation of the petrous internal carotid artery relative to the vidian canal on computed tomography: a case–control study evaluating the impact of petroclival chondrosarcoma
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Localisation of the petrous internal carotid artery relative to the vidian canal on computed tomography: a case–control study evaluating the impact of petroclival chondrosarcoma
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Journal Article
Localisation of the petrous internal carotid artery relative to the vidian canal on computed tomography: a case–control study evaluating the impact of petroclival chondrosarcoma
2022
Overview
BackgroundThe vidian canal (VC) is normally a reliable anatomical landmark for locating the petrous internal carotid artery (pICA). This study determined the influence of petroclival chondrosarcoma on the relationship between the VC and pICA.MethodsNine patients (3 males, 6 females; median age 49) with petroclival chondrosarcoma, and depiction of the pICA on contrast-enhanced CT, were retrospectively studied. CT-based measurements were performed by two observers, both in the presence of the petroclival chondrosarcoma (case) and on the contralateral control side. The antero-posterior (AP) and craniocaudal (CC) measurements from the posterior VC to the pICA, whether the pICA was in the trajectory of the VC, and the coronal relationship of the pICA anterior genu with the VC were recorded.ResultsChondrosarcoma usually displaced the pICA anteriorly (8/9 cases) and superiorly (6/9 cases) relative to the normal side with mean AP and CC measurements of 3.9 mm v 7.2 mm (p = 0.054) and 4.4 mm v 1.4 mm (p = 0.061). The VC trajectory less frequently intersected the pICA cross-section in the presence of chondrosarcoma however it was in the line of the eroded dorsal VC in one case. The anterior genu of the pICA was displaced more laterally by chondrosarcoma but usually remained superior to the VC.ConclusionPetroclival chondrosarcoma variably influences the anatomical relationship between the VC and the pICA, hence requiring an individualised approach. The pICA is usually anterosuperiorly displaced, and the anterior genu remains superior to the VC, however it may be located in the line of the canal.
Publisher
Springer Nature B.V
Subject
