Morphometric Study of Anterior Clinoid Process and Optic Strut and the Ossification of Carotico-Clinoid Ligament with their Clinical Importance

D’Souza, Antony Sylvan; Ankolekar, Vrinda Hari; Nayak, Nivedita; Hosapatna, Mamatha; Souza, Antony Sylvan D

doi:10.7860/jcdr/2016/19316.7520

Cited by 6 publications

(19 citation statements)

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“…However, the most interesting result concerns the verified association between sella turcica bridging and ossified carotico-clinoid ligament; in fact, the probability of being affected by anterior-posterior clinoid process bridging passes from 8.7% in the general population to 29.2% in subjects affected by sella turcica bridging. The existing literature was so far limited to the statement that the concurrent description of sella turcica bridging and ossified carotico-clinoid process is very rare, with a general prevalence ranging between 0.8% and 3.5% in Indian populations; 15,19,21 in addition, the same combination has been the topic of few case reports. 16,23 From this point of view, the present study is the first to highlight a possible association between the two variables.…”

Section: Discussionmentioning

confidence: 99%

“…13 As sella turcica bridging occurs early during the developmental period, it has been suggested as a screening test for possible genetic diseases and dental alterations. 9,11 Another abnormal ossification of the sella turcica perimeter has been reported in the literature regarding the carotico-clinoid ligament, which links the anterior clinoid process to the middle clinoid processes; a complete ossification of this ligament was reported in five out of 27 cases on skulls; 15 however, more precise epidemiological data concerning radiological examinations are still missing. The ossified carotico-clinoid ligament may have a developmental origin, deriving from the ossification of a ligament linking the anterior and middle clinoid processes, or of a fold of the dura mater.…”

Section: Introductionmentioning

confidence: 99%

“…14 The presence of variants of sella turcica may make this step difficult and increase the risk of surgical complications, especially in cases of aneurysm of the internal carotid artery and tuberculum sella meningiomas. 15,17 Very little information is available concerning the origin and distribution of such variants in the general population; with regard to sella turcica bridging, a general prevalence ranging between 1.1% and 13.0% has been reported. [2][3][4] On the other hand, the ossified carotico-clinoid ligament is mainly described in case reports, 18 whereas a few systematic studies have taken dry skulls into consideration, 12,[19][20][21] and have yet to consider radiological scans.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sella turcica bridging and ossified carotico-clinoid ligament: Correlation with sex and age

et al. 2018

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Aim Sella turcica bridging and ossified carotico-clinoid ligament are two variants of the sella turcica, the origin of which is partially unknown. These variations should be properly recognised, as they may hamper the removal of the anterior clinoid process in surgical procedures. Therefore, our aim was to determine the prevalence of these two anatomical variants and to investigate their prevalence according to patient sex and age in a series of maxilla computed tomography scans. Materials and methods We revised 300 computed tomography scans of the head from northern Italian patients, stratified into three age groups (18-40 years, 41-60 years, >60 years): a logistic regression analysis was used to explore an association of sella turcica bridging with age and sex through Matlab software, also including a test for the extracted model ( P < 0.05). Results The mean prevalence of sella turcica bridging and ossified carotico-clinoid ligament were 0.16 ± 0.06 (48/300, 16.0%) and 0.09 ± 0.03 (26/300, 8.7%), respectively. Statistically significant differences according to sex were found neither for sella turcica bridging ( P = 0.345) nor for ossified carotico-clinoid ligament ( P = 0.412). Only sella turcica bridging showed a correlation with age ( P = 0.007). In addition, the two variants were often associated, as patients without sella turcica bridging usually did not show ossified carotico-clinoid ligament ( P < 0.001). Discussion Our results suggest an association between the two variants, and provide a novel contribution to the debate around their origin.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sella turcica bridging and ossified carotico-clinoid ligament: Correlation with sex and age

et al. 2018

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“…The length was measured from the base to its tip while the width was measured at the base (Figure 1). These referenced points were based on a study by Souza et al, 2016. The thickness was measured using a pair of adjustable compasses with a ruler.…”

Section: Introductionmentioning

confidence: 99%

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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Assessment of the Anterior Clinoid Process and Optic Strut in Chiari Malformation Type I: A Computed Tomography Study

Özalp

Özgüral

Alpergin

et al. 2023

J Neurol Surg B Skull Base

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Objective This study aimed to evaluate morphological features of the anterior clinoid process (ACP) and the optic strut (OS) in Chiari malformation Type I (CM-I). Methods The study universe consisted of computed tomography images of 41 CM-I patients and 45 normal subjects. Comparison of the parameters for CM-I and the control group was performed with the Student's t-test. A “p < 0.05” was accepted as the significance level. Results ACP length was smaller in CM-I than the control group (p < 0.001). In contrast to ACP length, ACP angle (p < 0.001), OS length (p = 0.022), and the distance between ACP and OS (p = 0.020) were found greater in CM-I in comparison to the control group (p < 0.05). ACP width (p = 0.233) and OS width (p = 0.376) were similar in both groups. ACP pneumatization in CM-I group was found as 12.20%, whereas in the control group as 8.90%. Two different types about the pneumatization were identified in CM-I group (Type 1: 4.9% and Type 2: 7.3%), whereas three different types in the control group (Type 1: 3.3%, Type 2: 4.4%, and Type 3: 1.1%). Relative to ACP, three different types about OS position were identified in CM-I group (Type C: 31.70%, Type D: 64.60%, and Type E: 3.70%) and the control group (Type C: 7.80%, Type D: 64.40%, and Type E: 27.80%). Conclusions Shorter ACP, wide-angled ACP, longer OS, and more anteriorly located OS were found in CM-I group compared with the normal group. Our findings showed that the pneumatization of ACP was not affected by CM-I.

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Morphometric Study of Anterior Clinoid Process and Optic Strut and the Ossification of Carotico-Clinoid Ligament with their Clinical Importance

Abstract: Considering the immense anatomical surgical and radiological importance of morphology of ACP, OS and CCF, this study highlighted the detailed morphometry of these structures. The study also has explained the sexual dimorphism in their morphology.

Cited by 6 publications

References 9 publications

Sella turcica bridging and ossified carotico-clinoid ligament: Correlation with sex and age

Sella turcica bridging and ossified carotico-clinoid ligament: Correlation with sex and age

Morphology of the anterior clinoid process in a select Kenyan population

Assessment of the Anterior Clinoid Process and Optic Strut in Chiari Malformation Type I: A Computed Tomography Study

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