scholarly journals Corrigendum to “Optic Canal Decompression: Concepts and Techniques: 2-Dimensional Operative Video” by Devi P Patra, MD, MCh, MRCSEd, Evelyn L Turcotte, BS, Bernard R Bendok, MD, MSCI. Operative Neurosurgery, opab117, https://doi.org/10.1093/ons/opab117

2021 ◽  
Keyword(s):  
Optic Canal ◽  
Operative Neurosurgery

Optic Canal Decompression: Concepts and Techniques: 2-Dimensional Operative Video

2021 ◽  
Author(s):  
Devi P Patra ◽  
Evelyn L Turcotte ◽  
Bernard R Bendok
Keyword(s):  
Optic Nerve ◽  
Optic Canal ◽  
Complete Understanding ◽  
Anterior Clinoid Process ◽  
Endoscopic Endonasal ◽  
Oxford University ◽  
Copyright Information ◽  
Optic Strut ◽  
Transcranial Approach ◽  
Operative Neurosurgery

Abstract The optic canal (OC) is a bony channel that transmits the optic nerve (ON) and ophthalmic artery (OphA) as they course through the lesser wing of the sphenoid bone to the orbital apex. The OC is involved in a variety of intracranial and extracranial pathologies,1 and opening of the canal may be necessary in order to achieve adequate exposure, better disease control, and vision preservation.2 Depending on the location of the pathology and its relationship with the optic nerve, the OC may be decompressed through an open transcranial approach or an endoscopic endonasal approach.1,3 OC drilling can be tailored based on the location of the pathology and its extension. Anterior clinoid process and optic strut drilling can be added based on these factors as well.4,5 In this video, we demonstrate the steps of OC drilling in both transcranial microscopic and endoscopic endonasal approaches through a combination of animated illustrations and operative videos. We present 4 cases, including 2 transcranial microscopic and 2 endoscopic endonasal approaches,6 demonstrating OC decompression and its technical nuances. Each case was selected to represent the range of pathologies relevant to OC drilling to allow for a complete understanding of the techniques and concepts required for optimal treatment. An informed written consent has been obtained from each of the patients in this publication. Video © Mayo Foundation for Medical Education and Research. All rights reserved. Copyright information: Bendok BR, Abi-Aad KR, Sattur MG, Welz ME, Hoxworth JM, Lal D. Endoscopic resection of a paraclinoid meningioma extending into the optic canal: 2-dimensional operative video. Operative Neurosurgery. 2018 September 1;15(3):356 by permission of Oxford University Press. Cadaveric images provided by courtesy of: The Rhoton Collection. http://rhoton.ineurodb.org/.

Endoscopic Endonasal Anatomy of the Optic Canal

2013 ◽  
Vol 74 (S 01) ◽  
Author(s):  
Francisco A. Filho ◽  
Omar Ramirez ◽  
Yancy Acosta ◽  
Luis Bonilla ◽  
Milton Rastelli ◽  
...  
Keyword(s):  
Optic Canal ◽  
Endoscopic Endonasal

scholarly journals Extradural anterior clinoidectomy in surgical management of clinoidal meningiomas

2021 ◽  
Vol 57 (1) ◽  
Author(s):  
K. El-Bahy ◽  
Ashraf M. Ibrahim ◽  
Ibrahim Abdelmohsen ◽  
Hatem A. Sabry
Keyword(s):  
Cavernous Sinus ◽  
Tumor Resection ◽  
Visual Outcome ◽  
Extent Of Resection ◽  
Optic Canal ◽  
Falciform Ligament ◽  
Cavernous Sinus Invasion ◽  
Anterior Clinoidectomy ◽  
Microsurgical Techniques

Abstract Background Despite the recent advances in skull base surgery, microsurgical techniques, and neuroimaging, yet surgical resection of clinoidal meningiomas is still a major challenge. In this study, we present our institution experience in the surgical treatment of anterior clinoidal meningiomas highlighting the role of extradural anterior clinoidectomy in improving the visual outcome and the extent of tumor resection. This is a prospective observational study conducted on 33 consecutive patients with clinoidal meningiomas. The surgical approach utilized consisted of extradural anterior clinoidectomy, optic canal deroofing with falciform ligament opening in all patients. The primary outcome assessment was visual improvement and secondary outcomes were extent of tumor resection, recurrence, and postoperative complications. Results The study included 5 males and 28 females with mean age 49.48 ± 11.41 years. Preoperative visual deficit was present in 30 (90.9%) patients. Optic canal involvement was present in 24 (72.7%) patients, ICA encasement was in 16 (48.5%), and cavernous sinus invasion in 8 (24.2%). Vision improved in 21 patients (70%), while 6 patients (20%) had stationary course and 1 patient (3%) suffered postoperative new visual deterioration. Gross total resection was achieved in 24 patients (72.7%). The main factors precluding total removal were cavernous sinus involvement and ICA encasement. Mortality rate was 6.1%; mean follow-up period was 27 ± 13 months. Conclusions In this series, the use of extradural anterior clinoidectomy provided a favorable visual outcome and improved the extent of resection in clinoidal meningioma patients.

scholarly journals Transsphenoidal Optic Canal Decompression for Traumatic Optic Neuropathy Assisted by a Computed Tomography Image Postprocessing Technique

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
J. Li ◽  
Q. S. Ran ◽  
B. Hao ◽  
X. Xu ◽  
H. F. Yuan
Keyword(s):  
Optic Nerve ◽  
Sphenoid Sinus ◽  
Uncinate Process ◽  
Medial Wall ◽  
Optic Canal ◽  
Wide Field ◽  
Anatomical Landmarks ◽  
Invasive Approach ◽  
Ethmoidal Sinus ◽  
Less Invasive

The endoscopic transethmoidal approach is favored for the lack of external scars, a wide field of view, and rapid recovery time. But the effect of iatrogenic trauma should not be ignored due to the removal of the uncinate process and anterior and posterior ethmoidal sinus. Anatomically, the optic nerve is close to the sphenoid sinus and Onodi cell. In order to preserve the uncinate process and ethmoidal sinus, we perform endoscopic transsphenoidal optic canal decompression (ETOCD), which is less invasive. However, the anatomy of sphenoid sinus is quite variable, and the anatomical landmarks are rare. Therefore, identifying the position of optic canal is particularly important during surgery. To solve this, we use a postprocessing technique to identify the position of the optic nerve and internal carotid artery on the sphenoid sinus wall. Our results find that VA in 13 patients improved, with a total improve rate of 59.1%. No serious complications were found. We also found that the length of optic canal is different and the medial wall of the optic canal was the longest (p<0.05). The middle section of the optic canal is the narrowest, which was significantly different from cranial mouth and orbital mouth (p<0.05). We assumed that decompression may not require removal of all medial wall. If we remove the length of the shortest wall on the medial wall of the optic canal, the compression may be relieved. Thus, ETOCD was a feasible, safe, effective, and less-invasive approach for patients with TON. The CT postprocessing imaging facilitated recognition of the optic canal during surgery. The decompression length of the medial wall may not need to be completely removed, especially near the cranial mouth.

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