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Sphenoid bone

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https://www.readbyqxmd.com/read/29775148/the-pterygoclival-ligament-a-novel-landmark-for-localization-of-the-internal-carotid-artery-during-the-endoscopic-endonasal-approach
#1
Ali Tayebi Meybodi, Andrew S Little, Vera Vigo, Arnau Benet, Sofia Kakaizada, Michael T Lawton
OBJECTIVE The transpterygoid extension of the endoscopic endonasal approach provides exposure of the petrous apex, Meckel's cave, paraclival area, and the infratemporal fossa. Safe and efficient localization of the lacerum segment of the internal carotid artery (ICA) is a crucial part of such exposure. The aim of this study is to introduce a novel landmark for localization of the lacerum ICA. METHODS Ten cadaveric heads were prepared for transnasal endoscopic dissection. The floor of the sphenoid sinus was drilled to expose an extension of the pharyngobasilar fascia between the sphenoid floor and the pterygoid process (the pterygoclival ligament)...
May 18, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29775030/-endoscopic-transnasal-approach-for-surgical-treatment-of-skull-base-clival-area-chordomas-report-of-2-cases
#2
J Ma, P Fang, D Wang, Y J Liu
The case 1 performanced submandibular trauma because of the faint Suddenly. There were no obvious abnormality in physical examination. CT result showed that the tumour located in the lower clivus, and the atlas was infringed. MRI imaging showed the tumour located in the both sides of the internal carotid artery, infringed clivus and atlas front, forwarded into the nasal cavity and oral cavity. The case 2 performanced the left nose stuffy and increased gradually, nasopharyngeal mirror showed the left nasal cavity filled with new life...
February 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29765952/malignant-orbital-meningioma-originating-from-the-frontal-lobe
#3
Giancarlo A Garcia, Andrew E Choy, Anton N Hasso, Don S Minckler
Purpose of the Study: Orbital meningiomas are typically benign tumors, most commonly originating from the dura of the sphenoid wing or the optic nerve sheath. Procedures: We describe an unusual case of a malignant meningioma originating from the frontal lobe that ultimately produced orbital and distant metastases. Results and Conclusions: Orbital invasion by the meningioma was preceded by multiple incomplete resections, which may have facilitated access to the orbit...
April 2018: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/29709753/endoscopic-endonasal-approach-to-the-anteromedial-temporal-fossa-and-mobilization-of-the-lateral-wall-of-the-cavernous-sinus-through-the-inferior-orbital-fissure-and-v1-v2-corridor-an-anatomical-study-and-clinical-considerations
#4
Shunya Hanakita, Wei-Chieh Chang, Kentaro Watanabe, Daniel Ronconi, Moujahed Labidi, Hun-Ho Park, Kenichi Oyama, Anne-Laure Bernat, Sebastien Froelich
OBJECTIVE: The aim of this study was to identify key anatomical landmarks useful in gaining access to the anteromedial temporal region via the corridor formed by the inferior orbital fissure (IOF), the ophthalmic branch (V1), and the maxillary branch (V2) of the trigeminal nerve via the EEA. METHODS: An anatomical dissection of six cadaver heads was performed to confirm the feasibility and applicability of the EEA for accessing the anteromedial temporal region. RESULTS: Following middle turbinectomy, the lateral recess of the sphenoid sinus was opened, the orbital apex exposed, and the posterior wall of the maxillary sinus was removed, in sequence...
April 27, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29682061/transcranial-and-epidural-approach-for-spontaneous-cerebrospinal-fluid-leakage-due-to-meningoencephalocele-of-the-lateral-sphenoid-sinus
#5
Ryosuke Shintoku, Masahiko Tosaka, Tatsuya Shimizu, Yuhei Yoshimoto
We experienced a case of sphenoid sinus type meningoencephalocele manifesting as severe cerebrospinal fluid (CSF) rhinorrhea. A 35-year-old man became aware of serous nasal discharge 1 year previously, which had gradually worsened. The nasal discharge was diagnosed as CSF rhinorrhea. Head computed tomography (CT) showed several small depressions in the bone of the left middle cranial fossa, and the largest depression extended through the bone to the lateral sphenoid sinus. Head magnetic resonance imaging revealed that the meningoencephalocele projected to the lateral sphenoid sinus, through this small bone defect of the middle cranial fossa...
April 2018: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29682049/primary-extradural-meningioma-of-posterior-fossa-associated-with-acquired-chiari-malformation-a-short-review
#6
Guru Dutta Satyarthee
Generally, meningioma is considered intracranial lesion occurring in the intradural compartment. However, meningioma can also occur and usually confined in the extradural compartment called as primary extradural meningioma (PEM). PEM represents a special subgroup of meningioma constitute about 1% of all meningioma. PEM arises outside the subdural compartment and usually contains neither connection underlying subdural structures nor extends into with subdural compartment. It is commonly located in the paranasal sinus, middle ear, rarely in the intradiploic spaces of calvarial bone such as temporal, frontal, and parietal bone and orbit but extremely uncommonly in the occipital and sphenoid bones...
April 2018: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29676691/defining-the-lateral-limits-of-the-endoscopic-endonasal-transtuberculum-transplanum-approach-anatomical-study-with-pertinent-quantitative-analysis
#7
Alberto Di Somma, Jorge Torales, Luigi Maria Cavallo, Jose Pineda, Domenico Solari, Rosa Maria Gerardi, Federico Frio, Joaquim Enseñat, Alberto Prats-Galino, Paolo Cappabianca
OBJECTIVE The extended endoscopic endonasal transtuberculum transplanum approach is currently used for the surgical treatment of selected midline anterior skull base lesions. Nevertheless, the possibility of accessing the lateral aspects of the planum sphenoidale could represent a limitation for such an approach. To the authors' knowledge, a clear definition of the eventual anatomical boundaries has not been delineated. Hence, the present study aimed to detail and quantify the maximum amount of bone removal over the planum sphenoidale required via the endonasal pathway to achieve the most lateral extension of such a corridor and to evaluate the relative surgical freedom...
April 20, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29669195/early-fetal-development-of-the-otic-and-pterygopalatine-ganglia-with-special-reference-to-the-topographical-relationship-with-the-developing-sphenoid-bone
#8
Masahito Yamamoto, Kwang Ho Cho, Gen Murakami, Shinichi Abe, Jose Francisco Rodríguez-Vázquez
The otic and pterygopalatine ganglia are located close to the greater wing (alisphenoid) of the sphenoid bone and many researchers have noted nerves connecting these ganglia in human embryos. The greater wing (alisphenoid) arises from the cartilaginous ala temporalis independently of the lesser wing, but no topographical changes between this cartilage and nerve elements have been demonstrated. We examined histological sections of 20 human embryos and fetuses from 6 to 15 weeks of development (WD). At 6 WD, the ala temporalis, the alar process and ganglia were all identified as a single, undifferentiated cell mass...
April 18, 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29557698/myeloid-sarcoma-involving-the-greater-wing-of-the-sphenoid-bone-and-additional-skeletal-sites-presenting-with-unilateral-proptosis-and-fevers
#9
Jay C Wang, Juan C Jiménez Pérez, Alison M Friedmann, Abner Louissaint, Suzanne K Freitag
We report a case of myeloid sarcoma with multifocal skeletal involvement, including the greater wing of the sphenoid bone. A 23-month-old boy presented with left-sided proptosis and fevers, and was found to have an infiltrative mass involving the left sphenoid bone on orbital imaging. Full body imaging further demonstrated multiple bony lesions in the pelvis, thoracic and lumbar vertebrae, bilateral femura, and left humerus, and biopsies of the humerus were consistent with myeloid sarcoma. The patient was started on a standard chemotherapy regimen and is responding well...
March 20, 2018: Orbit
https://www.readbyqxmd.com/read/29552435/plasmacytoma-of-the-skull-base-a-rare-tumor
#10
Abhilasha Siyag, Tej P Soni, Anil K Gupta, Lalit M Sharma, Naresh Jakhotia, Shantanu Sharma
Plasmacytoma of the skull-base is a rare entity. Differential diagnosis includes chordoma, osteosarcoma, carcinoma nasopharynx, meningioma, metastatic carcinoma, lymphoma, and multiple myeloma. Accurate and precise diagnosis is extremely important for plasmacytoma of the skull-base as its treatment and prognosis is different from other skull-base lesions. A 41-year-old man presented with concerns of headache, diplopia, and left eye strabismus. A magnetic resonance image (MRI) of his brain showed a large expansile mass measuring 51 mm involving the clivus and central skull-base...
January 15, 2018: Curēus
https://www.readbyqxmd.com/read/29527397/wolf-in-sheep-s-clothing-intracranial-actinomycosis-masquerading-as-en-plaque-meningioma
#11
Harsh Deora, Manish Beniwal, Shilpa Rao, K V L N Rao, V Vikas, Sampath Somanna
Background: Actinomycosis israeli is a gram-positive non-acid-fast bacterium and is the most common causative agent of actinomycosis. It usually presents as a brain abscess via a secondary spread from the cervicofacial region or lungs. However, presentation as an en-plaque lesion with bone involvement out of proportion to brain parenchyma is rare and needs to be acknowledged. Case Description: We report a case of intracranial en-plaque lesion in a 47-year-old female with restriction of mouth opening and right third nerve palsy for 1 year...
2018: Surgical Neurology International
https://www.readbyqxmd.com/read/29510758/garcin-syndrome-caused-by-sphenoid-bone-metastasis-of-lung-cancer-a-case-study
#12
Satoshi Fukai, Naoyuki Okabe, Hayato Mine, Hironori Takagi, Hiroyuki Suzuki
BACKGROUND: Garcin syndrome, which consists of unilateral palsies of almost all cranial nerves without either sensory or motor long-tract disturbances or intracranial hypertension, can be caused by malignant tumors at the skull base. The case of a patient with lung cancer that metastasized to the sphenoid bone and resulted in Garcin syndrome is presented. CASE PRESENTATION: A 76-year-old woman was diagnosed as having non-small cell lung cancer with pericardial and diaphragmatic infiltration, cT4N1M0, stage 3A...
March 6, 2018: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29510274/an-alternative-endoscopic-anterolateral-route-to-meckel-s-cave-an-anatomical-feasibility-study-using-a-sublabial-transmaxillary-approach
#13
Kaan Yağmurlu, Michael A Mooney, Kaith K Almefty, Baran Bozkurt, Necmettin Tanriover, Andrew S Little, Mark C Preul
OBJECTIVE: To describe an endoscopic anterolateral surgical route to the lateral portion of Meckel's cave. METHODS: A sublabial transmaxillary transpterygoid approach was performed in 6 cadaveric heads (12 sides). A craniectomy was drilled between the foramen rotundum (FR) and foramen ovale (FO) with defined borders. Extradural dissection was performed up to the V2-V3 junction of the trigeminal ganglion. The working space was analyzed using anatomical measurements...
March 3, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29508089/a-novel-and-freely-available-interactive-3d-model-of-the-internal-carotid-artery
#14
Marc Valera-Melé, Anna Puigdellívol-Sánchez, Marija Mavar-Haramija, Juan A Juanes-Méndez, Luis San-Román, Matteo de Notaris, Alberto Prats-Galino
We describe a new and freely available 3D interactive model of the intracranial internal carotid artery (ICA) and the skull base that also allows to display and compare its main segment classifications. High-resolution 3D human angiography (isometric voxel's size 0.36 mm) and Computed Tomography angiography images were exported to Virtual Reality Modeling Language (VRML) format for processing in a 3D software platform and embedding in a 3D Portable Document Format (PDF) document that can be freely downloaded at http://diposit...
March 5, 2018: Journal of Medical Systems
https://www.readbyqxmd.com/read/29501044/sphenoid-meningioma-enplaque-with-proptosis-surgical-excision-reconstruction-and-outcome
#15
Abdelhakeem A Essa, Ali R Hamdan
OBJECTIVE: To evaluate surgical outcome and reconstruction of bone defects after excision of sphenoid meningioma enplaque. PATIENT AND METHODS: Between June 2012 and May 2016, a series of 15 patients presented by proptosis attended to neurosurgery departments, Assiut university hospital, Qena university hospital, South Valley University and, These patients were diagnosed with sphenoid meningioma enplaque by fulfilling its criteria by neuroimaging (sheet-like meningioma and hyperostosis)...
April 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29494810/developmental-characteristics-of-secondary-cartilage-in-the-mandibular-condyle-and-sphenoid-bone-in-mice
#16
Hidetomo Hirouchi, Kei Kitamura, Masahito Yamamoto, Kento Odaka, Satoru Matsunaga, Koji Sakiyama, Shinichi Abe
OBJECTIVE: Secondary cartilage develops from osteochondral progenitor cells. Hypertrophic chondrocytes in secondary cartilage increase within a very short time and then ossify rapidly. In the present study, we investigated the sequential development process of osteochondral progenitor cells, and the morphology and size of hypertrophic chondrocytes in secondary cartilage. DESIGN: ICR mice at embryonic days (E) 14.5-17.5 were used. The mandibular condyle and the medial pterygoid process of the sphenoid bone were observed as secondary cartilage, and the cranial base and the lateral pterygoid process of the sphenoid bone, which is primary cartilage, were observed as a control...
May 2018: Archives of Oral Biology
https://www.readbyqxmd.com/read/29489569/demystifying-the-triple-point-technical-nuances-of-the-fronto-orbital-advancement
#17
Christopher D Lopez, Anand Kumar, Alexander Y Lin, Christopher M Bonfield, Jeffrey Weinzweig, Thomas Naidich, Christopher M Smith, Peter J Taub
Removal of the fronto-orbital bandeau is one of the most critical components for procedures designed to correct anomalies of the craniofacial skeleton and remodel the anterior calvarial vault. It is also used to improve exposure of the anterior cranial fossa. It is arguably one of the more difficult portions of some craniofacial procedures. While the technique for fronto-orbito-sphenoid osteotomy has been frequently described, it has only been minimally detailed. Separation of bone in this region remains challenging due to the bone thickness, adjacent vital structures, and limited direct visibility...
May 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29481518/juvenile-nasopharyngeal-angiofibroma-with-sphenoid-sinus-invasion-and-protrusion-treatment-approach-with-le-fort-i-osteotomy
#18
Claiton Heitz, Alexandre Weber, Leandro Dini, Guilherme Pivatto Louzada, Eduardo Lombardo
Juvenile nasopharyngeal angiofibroma (JNA) is a rare benign tumor that occurs predominantly in young males. The authors report the case of a 22-year-old male patient who presented with a painless, exophytic tumor mass protruding through the right nostril, with anterior lateral extension associated with severe posterior involvement, erosion of the sphenoid bone to the right of the pterygoid process, and significant epistaxis. The preoperative evaluation, surgical approach, postoperative results, and a review of the literature are presented...
February 23, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29481497/single-piece-titanium-plate-cranioplasty-reconstruction-of-complex-defects
#19
Joseph Luo, David Anthony Morrison, Alex John Hayes, Arul Bala, Guy Watts
BACKGROUND: Different methods have been described for the reconstruction of cranial defects and orbital defects. The complex contouring between the orbital roof and frontal bone creates significant design challenges for prefabricated cranio-orbital reconstructions. In describing the first reported patient of combined skull and orbital roof reconstruction with a single-piece titanium plate cranioplasty, the authors present a new method of combined complex cranio-orbital reconstruction...
February 23, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29478095/-the-pen-is-mightier-than-the-sword-suicidal-trans-orbital-intracranial-penetrating-injury-from-a-pencil
#20
Danica Cvetković, Vladimir Živković, Irina Damjanjuk, Slobodan Nikolić
A 40-year-old drug addict, who was being treated with methadone and occupational therapy, committed suicide by striking a wooden pencil into his right eye socket. While still conscious, he hit his head hard against a table, jamming the pencil even deeper into his head. The autopsy showed that the pencil missed the globe and lodged in the inner part of the right eye socket. It pierced the orbital part of the right ethmoid bone, the right ethmoid cells, and the right superior nasal concha, then passed through the body of the sphenoid bone and the clivus of the occipital bone before stopping in the brain tissue...
February 24, 2018: Forensic Science, Medicine, and Pathology
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