A Computed Tomography Study of the Prechiasmatic Sulcus Anatomy in Children

Beğer, Orhan; Ten, Barış; Balcı, Yüksel; Çakır, Salim; Özalp, Hakan; Hamzaoğlu, Vural; Vayısoğlu, Yusuf; Dağtekin, Ahmet; Bağdatoğlu, Celal; Talaş, Derya Ümit

doi:10.1016/j.wneu.2020.05.023

Cited by 6 publications

(20 citation statements)

References 21 publications

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“…On the other hand, both structures may be utilized as anatomical landmarks to provide intraoperative orientation 9,13–15. Therefore, surgeons should know the anatomy of ACP and OS well in order to perform a successful intervention 1,10,16,17…”

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confidence: 99%

“…9,[13][14][15] Therefore, surgeons should know the anatomy of ACP and OS well in order to perform a successful intervention. 1,10,16,17 Kerr et al 18 studied on OS position related to the prechiasmatic sulcus and suggested that its location might affect surgical approach selection, patient positioning, and intraoperative surgical orientation. The available literature provides sufficient information on the location of OS relative to ACP and the prechiasmatic sulcus.…”

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confidence: 99%

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Change in the Location of the Optic Strut Relative to the Anterior Clinoid Process Pneumatization

Adanır¹,

Ceylan

İnceoğlu³

et al. 2022

Journal of Craniofacial Surgery

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Objective: This study aimed to peruse the alteration of the position of the optic strut (OS) according to the anterior clinoid process (ACP) pneumatization. Methods: This retrospective study conducted on cone-beam computed tomography images of 400 patients with a mean age of 36.49±15.91 years. Results: Anterior clinoid process length, width, and angle were measured as 10.56±2.42 mm, 5.46±1.31 mm, and 42.56±14.68 degrees, respectively. The tip of ACP was measured as 6.60±1.50 mm away from the posterior rim of OS. In the 631 sides (78.87%) did not have ACP pneumatization. In the cases with ACP pneumatization, three different configurations were identified as follows: Type 1 in 71 sides (8.87%), Type 2 in 56 sides (7%), and Type 3 in 42 sides (5.23%). Relative to ACP, the location of OS was determined as follows: Type A in 29 sides (3.64%), Type B in 105 sides (13.12%), Type C in 344 sides (43%), Type D in 289 sides (36.12%), and Type E in 33 sides (4.12%). The spread of data related to the attachment site of OS according to the presence or absence of ACP pneumatization showed that the location of OS was affected by ACP pneumatization (P<0.001). In ACPs with pneumatization, the frequency of OS position relative to ACP was found as follows: Type A in none of sides (0%), Type B in 8 sides (7.6%), Type C in 53 sides (15.4%), Type D in 88 sides (30.4%), and Type E in 20 sides (60.6%). Conclusions: The main finding of this study was that the location of OS relative to ACP was affected by ACP pneumatization. In ACPs with pneumatization, OS was located more posteriorly compared with ACPs without pneumatization.

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confidence: 99%

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confidence: 99%

Change in the Location of the Optic Strut Relative to the Anterior Clinoid Process Pneumatization

Adanır¹,

Ceylan

İnceoğlu³

et al. 2022

Journal of Craniofacial Surgery

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“…14 For these reasons, anatomical variations of the structures including the CR may be important in terms of effective and successful surgical outcome. 5,6,8,13,20,21 Meningiomas localized in the suprasellar region may be removed with transcranial approaches from ''above,'' while with endoscopic transnasal approach from ''below.'' 8,12 The potential area beneath the CR poses a residual tumor risk during the removal of meningiomas using transcranial techniques.…”

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confidence: 99%

“…Skull base tumors, especially meningiomas, frequently arise from the suprasellar region (eg, the planum sphenoidale, limbus sphenoidale, prechiasmatic sulcus, diaphragma sellae, or tuberculum sellae) 1–4 . The surgical management of the suprasellar meningiomas (eg, surgical approach choice including frontolateral, transnasal transsphenoidal, subfrontal, tailored bifrontal, transsylvian, extended bifrontal, orbitozygomatic, pterional, and supraorbital) may differ depending on tumor size (small or large), tumor location (limited to midline or spread to lateral), and anatomic features of the region (eg, prechiasmatic sulcus length and angle) 5–13 . Tumors with aggressive behavior characterized by invasion of adjacent anatomical structures may cause technical difficulties (eg, surgical approach choice) for surgeons due to anatomical variations 5,8,11,14 .…”

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“…The surgical management of the suprasellar meningiomas (eg, surgical approach choice including frontolateral, transnasal transsphenoidal, subfrontal, tailored bifrontal, transsylvian, extended bifrontal, orbitozygomatic, pterional, and supraorbital) may differ depending on tumor size (small or large), tumor location (limited to midline or spread to lateral), and anatomic features of the region (eg, prechiasmatic sulcus length and angle) 5–13 . Tumors with aggressive behavior characterized by invasion of adjacent anatomical structures may cause technical difficulties (eg, surgical approach choice) for surgeons due to anatomical variations 5,8,11,14 . In this regard, the morphology of the chiasmatic ridge (CR) defined by Guthikonda et al 8 as a bony protrusion of the planum sphenoidale atop of the prechiasmatic sulcus may be important for neurosurgeons and neuroradiologists during preoperative surgical planning.…”

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Chiasmatic Ridge: Incidence, Classification, and Clinical Implications

Beğer

Bahşi

2020

Journal of Craniofacial Surgery

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Objective: The study aimed to identify the chiasmatic ridge (CR) morphology and to discuss its surgical significance. Methods: The suprasellar region of 90 adult dry skulls with unknown ages, sexes, or nationalities was examined to record the shape and incidence of the CR. Results: The CR was found in 14 (15.56%) of 90 dry skulls. The ridge was classified into 3 types, taking into account its shape, incidence (presence/absence), and the risk of residual tumor formation. The absence of the CR was named as Type 1 (76 cases, 84.44%). The bony extension without a hidden area was identified as Type 2 (8 cases, 8.89%), while the bony extension with a hidden area as Type 3 (6 cases, 6.67%). Conclusion: Type 3 CR (which has an evident hidden area beneath the ridge) should be taken into account by neurosurgeons to eliminate possible residual tumor risk during removal of tumors (eg, meningioma) with subfrontal or supraorbital approaches.

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