Pre-Operative Measurement of the Morphometry and Angles of the Anterior Clinoid Process (ACP) for Aneurysm Surgery

Çeçen, Ayçiçek; Çelikoğlu, Erhan; İş, Merih; Kale, Ayşin; Eroglu, Basak Torum

doi:10.4067/s0717-95022016000400026

Cited by 10 publications

(29 citation statements)

References 22 publications

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“…9,12,14,18,[25][26][27][28] Anatomical features of ACP and OS may affect surgical approach selection, patient positioning, and intraoperative surgical orientation. 18,23,25,29 For instance, considering the length, width, and angle of ACP, Cecen et al 23 classified its morphology as 3 different configurations: the long, narrow, and narrow-angled type (43 ACPs, 17.8%); the short, wide, and wideangled type (40 ACPs, 16.5%); and the other types (159 ACPs, 65.7%). They reported that the long, narrow, and narrow-angled ACP might call for a more complicated operating procedure, while the short, wide, and wide-angled ACP for an easier intervention.…”

Section: Discussionmentioning

confidence: 99%

“…and with well quality CBCT scans. The exclusion criteria of the study were as follows: subjects aged under 18 y; CBCT images with artifact and distortion in the examination area, taking into account previous studies,20,23–25 the following parameters were determined (Fig. 1): Considering the classification of Lee et al,20 OS location relative to ACP was identified as six types: Type A: anterior to ACP root, Type B: anterior 1/5 of ACP, Type C: anterior 2/5 of ACP, Type D: anterior 3/5 of ACP, Type E: anterior 4/5 of ACP, and Type F: posterior 1/5 of ACP. It was determined whether there was ACP pneumatization.…”

Section: Methodsmentioning

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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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

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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“…The length and width of ACP influence its type which influences the surgical techniques applied during anterior clinoidectomies (Cecen et al, 2016). Based on our modification of the criteria by Cecen et al, (2016), most of the ACP in our population were type IIIb (long and wide). This is comparable to the findings of Cecen et al, 2016 on a Brazilian population in which type III ACPs in general were the commonest (65.7%).…”

Section: 8%mentioning

confidence: 93%

“…The dimensions are used to determine the types of ACP. The types influence the choice of surgical technique employed during anterior clinoidectomy (Cecen et al, 2016). There is however paucity of data in the African populations and lacking all together among Kenyans.…”

Section: Introductionmentioning

confidence: 99%

“…All the measurements were recorded in millimeters. The ACP was classified into four types based on the dimensions using a modification of the criteria given by Cecen et al, (2016). The classification is as follows: Type I-short (<10.5mm) and wide (>8.14mm), type II long (>10.5mm) and narrow (<8.14mm), type IIIa short (<10.5) and narrow (<8.14), type IIIb long (>10.5) and wide (>8.14).…”

Section: Introductionmentioning

confidence: 99%

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Morphology of the anterior clinoid process in a select Kenyan population

Sibuor¹,

Cheruiyot²,

Munguti³

et al. 2018

Anat. J. Afr.

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Knowledge of the morphological variations of the anterior clinoid process is pertinent during anterior clinoidectomy to prevent injury to the adjacent neurovascular structures as well as in the interpretation of skull base radiographs. Fifty-one open crania (102 anterior clinoid processes) were obtained from the Departments of Human Anatomy in three Kenyan Universities. Caroticoclinoid foramen was present in nine (17.6%) out of the 51 skulls studied. Of the 9 skulls, 2 had bilateral complete foramina while the remaining 7 had unilateral foramina, all on the left side. The mean length of the anterior clinoid process ranged between 5.0 and 18.8mm with a mean of 10.92±2.79 mm. The mean width was found to be 10.43±2.67 mm (range: 5.3-18.0mm) while the average thickness was 5.43±2.02mm (range: 1.3-11.9mm). There were no statistically significant side differences in the dimensions of the anterior clinoid process. Type IIIb anterior clinoid process was the commonest (47.1%) while type IIIa was the least common (7.8%). Compared to other populations, the anterior clinoid process in our setting shows some differences involving its type and the caroticoclinoid foramen. These features should be taken into account when interpreting skull base radiographs and planning for anterior clinoidectomies.Keywords: Clinoid Process, Kenya, Morphology

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Pediatric Anatomy of the Anterior Clinoid Process on Computed Tomography Images

Yıldızoğlu,

Özdemir,

Çetin

et al. 2024

J Neurol Surg B Skull Base

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Objective To show the change in the anterior clinoid process (ACP) morphology in children with advancing age. Methods Radiologic images of 180 subjects aged 1 to 18 years were included in the work. The length (ACPL), width (ACPW), and angle (ACPA) of ACP, and the distance (DisACPOS) of ACP to the optic strut (OS) were measured. ACP pneumatization and OS location types were noted. Results ACPL, ACPW, and ACPA, and DisACPOS were measured as 12.34 ± 2.29 mm, 4.52 ± 1.03 mm, 26.26 ± 4.30°, and 5.10 ± 1.12 mm, respectively. ACP pneumatization was identified in 30 (8.3%) sides. Four types regarding its pneumatization were observed: Type 0 in 91.7% out of 360 sides, Type 1 in 2.5%, Type 2 in 3.6%, and Type 3 in 2.2%. Three configurations regarding OS location types were observed as follows: Type C in 3.6% out of 360 sides, Type D in 51.7%, and Type E in 44.7%. Linear function was calculated as y = 9.377 + 0.312 × age for ACPL, y = 3.716 + 0.084 × age for ACPW, and y = 3.808 + 0.136 × age for DisACPOS. Conclusion ACPL, ACPW, and DisACPOS increased, but ACPA did not vary with advancing ages in children. OS was located more posteriorly in children compared with adults. Most of ACP pneumatization was seen after prepubescent period.

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Pre-Operative Measurement of the Morphometry and Angles of the Anterior Clinoid Process (ACP) for Aneurysm Surgery

Cited by 10 publications

References 22 publications

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

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

Morphology of the anterior clinoid process in a select Kenyan population

Pediatric Anatomy of the Anterior Clinoid Process on Computed Tomography Images

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