Surgical Anatomy and Efficient Modification of Procedures for Selective Extradural Anterior Clinoidectomy

Hayashi, Naokazu; Masuoka, Takeshi; Tomita, Tadanori; Sato, Hidetoshi; Ohtani, Osamu; Endo, Shiori

doi:10.1055/s-2004-830121

Cited by 23 publications

(17 citation statements)

References 5 publications

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“…In the present study the average basal width, length and thickness of the ACP were found to be 7.3 mm, 9.7 mm, and 5.4 mm, respectively. Similar observations were reported by Gupta et al, Hunnargi et al, Huynh-Le et al, Lee et al, and in Nepal, Indian, Japan and Korean skulls, respectively (15,16,20,28). The comparison of the findings revealed that the mean length of ACP is the longest in the Indian population.…”

Section: Dural Fold Vascular and Neural Anatomical Findingssupporting

confidence: 89%

Regional microsurgical anatomy and variations of the anterior clinoid process

Dağtekin

Avcı²,

Uzmansel³

et al. 2014

Turkish Neurosurgery

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The aim of this study was to better define the microsurgical anatomy of the supra/parasellar region and describe variations of the anterior clinoid process (ACP). MATERIAL and METHODS:Fifteen formalin-fixed cadaver heads and 25 dry skulls were used to define the microsurgical anatomy of the ACP and related structures. The presence of the caroticoclinoid foramen (CaCF) as well as other relevant measurements were all noted. Radiological examination of the CaCF was also demonstrated on dry skulls. RESULTS:Interosseous bridges, which form between the anterior and middle clinoid processes or connect all three (anterior, middle and posterior) clinoid processes, were found in 30% of the specimens. The average basal width, length and thickness of the ACP were 7.3 mm, 9.7 mm and 5.4 mm, respectively. Length of the optic nerve (ON) up to the falciform ligament (FL) was 10.9 mm; length of the ON under the FL was 2.7 mm; length of ON after removal of the ACP and unroofing the optic canal was 21.1 mm. CONCLUSION:This study contributes to the relationship of important vascular, neural, bone and dural layers of this region and also demonstrates the variations of ACP by means of microsurgical dissections and radiological examinations. BULGULAR: İnterosseöz köprü, anterior ve orta klinoid proçes birleşmesiyle veya diğer 3 klinoid proçesin (anterior, orta, arka klinoid proçes) birleşmesiyle oluşur ve bu varyasyon %30 oranında tespit edilmiştir. Anterior klinoid proçesin bazal genişliği, uzunluğu ve kalınlığı sırası ile 7,3 mm, 9,7 mm ve 5,4 mm olarak bulunmuştur. Optik sinirin falsiform ligamana olan uzaklığı 10,9 mm, falsiform ligaman altındaki uzaklığı 2,7 mm, optik sinirin anterior klinoid proçes alındıktan ve optik kanal açıldıktan sonraki uzunluğu 21,1 mm olarak bulunmuştur. SONUÇ:Çalışmada anterior klinoid proçes varyasyonları ve bu bölge ile ilgili önemli vasküler, nöral ve kemik yapıların ilişkisi mikrocerrahi ve radyolojik çalışma ile yeniden değerlendirilmiştir.

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Section: Dural Fold Vascular and Neural Anatomical Findingssupporting

confidence: 89%

Regional microsurgical anatomy and variations of the anterior clinoid process

Dağtekin

Avcı²,

Uzmansel³

et al. 2014

Turkish Neurosurgery

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“…Hunnargi et al (2008), reported in their dry skull study, differences between South Indian, Nepalese and Korean ACP dimensions on both the right and left side. They found that the average length of the right ACP was 10.68±1.90 mm and that of the left Hayashi (2004) and by Gupta et al (2005). Both the right and left ACPs were longer in South Indian skulls than Nepalese and Korean skulls (Gupta et al; Hunnargi et al; Lee et al).…”

Section: Discussionmentioning

confidence: 86%

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

et al. 2016

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CELIKOGLU, E.; IS, M.; CETINER KALE, A. & TORUM EROGLU, B.Pre-operative measurement of the morphometry and angles of the anterior clinoid process (ACP) for aneurysm surgery. Int. J. Morphol., 34(4):1333Morphol., 34(4): -1338Morphol., 34(4): , 2016. SUMMARY:The anterior clinoid process (ACP) is proximal to vital structures, such as the optic nerve, internal carotid artery and ophthalmic artery; therefore, study of its anatomy is important in guiding and defining surgery. We studied the anatomical structure of the ACP, including the angle formed by the apex of the ACP triangle, and its orientation, to provide information for easier and safer surgery. The measurement was performed on the axial planes of 242 cranial computerized tomography (CT) scans and 27 adult Turkish skulls of both sexes. The length of the ACP, width of the ACP at its base, the angle formed by the apical angle of the ACP triangle and the orientation of the ACP defined according to the sagittal midline were examined. In the Turkish skulls, the length and width of the ACP were similar to previous studies. Our study was the first to measure the angle and orientation of the ACP. The mean angle was 39. 67±12.64 (16.6-89.5) and 135 posterior (55 %) and 107 medial (45 %) orientations. Surgical complications can be avoided by pre-operative radiological planning using axial CT scans and by determining whether the morphology is Type 2 (long, narrow, acute-angled), which requires total resection.

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“…8,[10][11][12] Radical removal of tumors in the suprasellar and parasellar regions, and treatment of aneurysms associated with the internal carotid and upper basilar arteries or intracavernous, requires a detailed knowledge of these regions in terms of their morphology and morphometry: variations are of major surgical significance. 10,13 Knowing the variation in size and shape of the ACP gives an estimate of the location of paraclinoid and cavernous sinus aneurysms. 6 In addition to the presence of the bony caroticoclinoid canal, formed by union of the middle and ACPs, makes the removal of the ACP more difficult and increases the associated risks.…”

mentioning

confidence: 99%

Surgical Importance of the Morphometry of the Anterior Clinoid Process, Optic Strut, Caroticoclinoid Foramen, and Interclinoid Osseous Bridge

Boyan

Ozsahin

Kızılkanat

et al. 2011

Neurosurgery Quarterly

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This study was undertaken to determine the morphometry of the anterior clinoid process (ACP), optic strut (OS), caroticoclinoid foramen, and interclinoid osseous bridge in skulls of Turkish adults. Measurements were taken from 34 dry skulls of unknown age and sex. The overall means, and associated standard deviations, of the distances measured are: basal width of the ACP at the medial margin of the optic canal (OC) 12.4 ± 2.1 mm; from the anterior clinoid tip (ACT) to the base of the ACP 11.5 ± 1.9 mm; from the ACT to the posterior margin of the OS 6.9 ± 1.6 mm; thickness of the ACP 4.3 ± 1.2 mm; from the ACT to the junction of the medial edge of the ACP and the posterolateral edge of the OC roof 8.9 ± 1.6 mm; from the ACT to the center point of the posterior edge of the OC roof 11.4 ± 1.7 mm; from the ACT to the lateral end of the superior orbital fissure 23.7 ± 3.9 mm; from the ACT to the anterior edge of the OS base 8.6 ± 1.7 mm; from the ACT to the posterior edge of the OS base 6.5 ± 1.5 mm; from the ACT to the posterior clinoid process 10.6 ± 2.4 mm; between the ACTs 25.8 ± 2.7 mm. In addition, the presence of a caroticoclinoid process and interclinoid bridge was identified and the types were classified. Knowledge of the morphometry of the parasellar and suprasellar regions is extremely important for neurosurgeons.

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Surgical Anatomy and Efficient Modification of Procedures for Selective Extradural Anterior Clinoidectomy

Cited by 23 publications

References 5 publications

Regional microsurgical anatomy and variations of the anterior clinoid process

Regional microsurgical anatomy and variations of the anterior clinoid process

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

Surgical Importance of the Morphometry of the Anterior Clinoid Process, Optic Strut, Caroticoclinoid Foramen, and Interclinoid Osseous Bridge

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