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Foramen rotundum

Li Gao, Lei Zhou, Zhengshou Dai, Xinsheng Huang
PURPOSE: The authors studied the anatomic importance of the endoscopic prelacrimal recess approach (PLRA) to the pterygopalatine fossa (PPF) and infratemporal fossa (ITF). METHODS: Ten adult heads (20 sides) from cadavers fixed in formalin were dissected using the PLRA. Anatomic dissections were detailed and several crucial landmarks measured. RESULTS: Identification of the infraorbital neurovascular bundle is the crucial step for the detection of other branches of the maxillary artery...
January 18, 2017: Journal of Craniofacial Surgery
Pengfei Liu, Wenxiang Zhong, Chenlong Liao, Ming Liu, Wenchuan Zhang
Primary trigeminal neuralgia (TN) may occasionally occur in absence of neurovascular compression. A mechanism other than nerovascular compression may play a role in TN. High-resolution computed tomographies (CTs) of 21 consecutive TN patients without vascular compression during surgery and 30 healthy volunteers were retrospectively performed. Measuring parameters (length, width, and aspect ratio) were obtained in the axial plane for foramen ovale, and in the reconstructed coronal plane for foramen rotundum on both sides in each subject...
November 2016: Journal of Craniofacial Surgery
Pedzisai Mazengenya, Okobi Ekpo
Variations of the skull base foramina are quite common and often cause surgical confusion during surgical intervention of the region. The unusual foramen was observed in five (0.98%) adult skulls of black South Africans obtained from the Raymond A Dart collection of human specimens housed in the School of Anatomical Sciences at the University of the Witwatersrand. Three of the five specimens were females while the remaining two were males. In four of the five skulls, the unusual foramen was located anterolateral to the foramen rotundum both on the left and right sides...
November 11, 2016: Surgical and Radiologic Anatomy: SRA
Randle Umeh, Marios Loukas, Rod J Oskouian, R Shane Tubbs
BACKGROUND: Arachnoid granulations are hypertrophied arachnoid villi, which extend from the subarachnoid space into the venous system and aid in the passive filtration and reabsorption of cerebrospinal fluid. These macroscopic structures have been described in various locations, with the transverse and sigmoid sinuses seen as normal variant s on imaging. CASE REPORT: Here we present the occurrence of an enlarged arachnoid granulation at the foramen rotundum where a variant intracranial venous sinus was identified during routine dissection...
November 4, 2016: Folia Morphologica (Warsz)
Zaid A Al-Qudah, Hussam A Yacoub, Nizar Souayah
INTRODUCTION: Sarcoidosis is a chronic, systemic, inflammatory disorder that is characterized by the formation of noncaseating granulomas. Patients may present with cranial nerve palsy, paresthesia, paresis, pyramidal signs, progressive cognitive decline, urinary retention, seizures, or hypothalamic-pituitary syndrome. Although the diagnosis of neurosarcoidosis can be challenging, neurological manifestations of sarcoidosis occur more frequently than previously described. CASE REPORT: A 23-year-old African American man presented to our emergency department with diplopia, which was worsened on left horizontal gaze...
November 2016: Neurologist
Rimal Hanif Dossani, Hesam Akbarian-Tefaghi, Lori Lemonnier, Vikas Mehta, Jamie A Jacobsohn, Bharat Guthikonda
Mucoepidermoid carcinoma (MEC) is one of the most common malignant tumors of both major and minor salivary glands. Although there are reports of parotid MEC tumors extending intracranially via the facial nerve, intracranial extension from MEC originating from minor salivary glands in the palate has not previously been reported. This report presents a case of MEC arising from the minor salivary glands of the palate and extending into the middle fossa via the foramen rotundum with perineural invasion of the maxillary division of the trigeminal nerve...
October 2016: Journal of Neurological Surgery Reports
Pengfei Liu, Wenxiang Zhong, Chenlong Liao, Ming Liu, Wenchuan Zhang
Primary trigeminal neuralgia (TN) may occasionally occur in absence of neurovascular compression. A mechanism other than nerovascular compression may play a role in TN. High-resolution computed tomographies (CTs) of 21 consecutive TN patients without vascular compression during surgery and 30 healthy volunteers were retrospectively performed. Measuring parameters (length, width, and aspect ratio) were obtained in the axial plane for foramen ovale, and in the reconstructed coronal plane for foramen rotundum on both sides in each subject...
August 25, 2016: Journal of Craniofacial Surgery
P Wu, Z Y Yang, Y Liu, Y Li, Y H Tan
OBJECTIVE: To analyze the impact of maxillofacial injury on skull base. METHODS: A three-dimensional(3D)finite-element model of cranio-maxillofacial bone was established by CT scan data. A lead cylinder in base diameter of 3 cm was designed as an impactor. There regions(upper right maxilla, left infraorbital margin and left zygomatic body)subjected to an impact at the speed of 8.6 m/s(about 30 km/h)was simulated. Thirteen landmarks at the skull base were selected...
August 2016: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Naoki Otani, Kojiro Wada, Terushige Toyooka, Kazuya Fujii, Yasushi Kobayashi, Kentaro Mori
BACKGROUND: Extradural temporopolar approach (ETA) has been modified as less invasive manner and named as trans-superior orbital fissure (SOF) approach with mini-peeling technique. The present study discusses the operative nuances of this modified technique on the basis of cadaveric study of lateral cavernous structures. METHODS: In five consecutive cadaveric specimens, we performed an extradural anterior clinoidectomy with mini-peeling of the dura propria to expose the anterior clinoid process entirely...
2016: Surgical Neurology International
Alireza Mohebbi, Shahin Rajaeih, Mahdi Safdarian, Parisa Omidian
INTRODUCTION: The sphenoid sinus is an important structure in ventral skull base surgeries that is surrounded by several vital anatomical structures including the internal carotid arteries, optic nerve and cranial nerves inside the cavernous sinus. In addition, the foramen rotundum is a small canal deeply situated in the base of the skull, which represents the way for exit of the maxillary nerve. Understanding of the sphenoid bone anatomical relationships is central to the expanded endonasal approaches to the skull base...
May 24, 2016: Brazilian Journal of Otorhinolaryngology
Kazuhide Adachi, Motoharu Hayakawa, Kohei Ishihara, Tukasa Ganaha, Shinya Nagahisa, Mituhiro Hasegawa, Yuichi Hirose
OBJECTIVE: To elucidate venous drainage patterns to avoid damage to the venous drainage route in the middle cranial fossa and superior petrosal sinus when employing the transpetrosal approach. METHODS: Venous drainage patterns were assessed using three-dimensional computed tomography venography in 22 hemispheres of petroclival meningioma (PCM) cases from patients who underwent primary surgery and 40 hemispheres of control cases. Intracranial venous drainage patterns were compared between control cases and PCM cases...
August 2016: World Neurosurgery
Laila Pérez de San Román-Mena, Juan Antonio Simal-Julián, Pablo Miranda-Lloret, Carlos Botella-Asunción
BACKGROUND: Surgical approaches to skull base lesions that affect the maxillary nerve are complex, due to deep location and presence of relevant neurovascular structures surrounding this area. METHOD: We propose the transantral endoscopic approach (TEA) for the treatment of lesions affecting the maxillary nerve or its vicinity. More specifically, the ones that are located anterior to the foramen rotundum. CONCLUSIONS: This technique represents a minimally invasive treatment option for these kind of cranial base lesions...
June 2016: Acta Neurochirurgica
Azadeh Rahmati, Roshanak Ghafari, Maryam AnjomShoa
STATEMENT OF THE PROBLEM: The sphenoid sinus is a common target of paranasal surgery. Functional endoscopic sinus surgery is likely to endanger the anatomic variations of vital structures adjacent to the sphenoid sinus. PURPOSE: The aim of this study was to determine the variations of sphenoid sinus and the related structures by using cone-beam computed tomography (CBCT). MATERIALS AND METHOD: In this descriptive-analytic study, CBCT images of 103 patients aged above 20-years were selected (206 sides)...
March 2016: Journal of Dentistry
Ali M Elhadi, Hasan A Zaidi, Kaan Yagmurlu, Shah Ahmed, Albert L Rhoton, Peter Nakaji, Mark C Preul, Andrew S Little
OBJECTIVE Endoscopic transmaxillary approaches (ETMAs) address pathology of the anterolateral skull base, including the cavernous sinus, pterygopalatine fossa, and infratemporal fossa. This anatomically complex region contains branches of the trigeminal nerve and external carotid artery and is in proximity to the internal carotid artery. The authors postulated, on the basis of intraoperative observations, that the infraorbital nerve (ION) is a useful surgical landmark for navigating this region; therefore, they studied the anatomy of the ION and its relationships to critical neurovascular structures and the maxillary nerve (V2) encountered in ETMAs...
December 2016: Journal of Neurosurgery
Jianfeng Liu, Jun Han, Dazhang Yang, Dandan Liu, Rui Li, Yanbing Yu, Qiuhang Zhang, Juan C Fernandez Miranda, Paul A Gardner, Carl H Snyderman
OBJECTIVE: To identify the landmarks of transpterygoid approach and to report its application in a series of cases. METHODS: Two silicon-injected adult cadaveric heads(4 sides) were dissected by performing an endoscopic endonasal transpterygoid approach after CT scanning for imaging guidance. High-quality pictures were obtained. This approach was used to treat twelve patients with skull base lesions including 3 spontaneous cerebrospinal fluid (CSF) leaks in the lateral recess of the sphenoid sinus, 2 neurofibromas and 2 Schwannomas involving the pterygopalatine fossa and infratemporal fossa, 1 dermoid cyst involving the middle fossa and infratemporal fossa, 1 invasive fungal sinusitis invading the middle fossa base, 1 basal cell adenoma in the upper parapharyngeal space, 1 chondrosarcoma in the parasellar region and 1 adenoid cystic carcinoma...
November 2015: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
Kaan Orhan, Melis Misirli, Secil Aksoy, Umut Seki, Evren Hincal, Tugrul Ormeci, Ahmet Arslan
PURPOSE: The aim of this study was to examine the anatomy and variations of the infraorbital foramen and its surroundings via morphometric measurements using cone beam computed tomography (CBCT) scans derived from a 3D volumetric rendering program. METHODS: 354 sides of CBCT scans from 177 patients were examined in this study. DICOM data from these images were exported to Maxilim® software in order to generate 3D surface models. The morphometric measurements were done for infraorbital foramen (IOF), infraorbital groove (IOG) and infraorbital canal (IOC)...
January 2016: International Journal of Artificial Organs
Tongqing Xue, Weixi Yang, Yunhu Guo, Weiwei Yuan, Jianhu Dai, Zhenxin Zhao
Percutaneous radiofrequency thermocoagulation of the trigeminal ganglion through the foramen ovale is a well-established procedure for the treatment of trigeminal neuralgia (TN). However, this approach can be tricky when individual trigeminal sub-branch nerve block is required. We report our initial experience of image-guided radiofrequency thermocoagulation of the maxillary branch through the use of foramen rotundum.From February 2012 to February 2015, we treated 25 patients with isolated TN of the maxillary branch...
November 2015: Medicine (Baltimore)
Jie Gao, Tao Pan, Qianyan He, Yuhao Zhao, Li Li, Mushui Qiu, Hao Qu, Jingyi Shi, Sirui Wang, Kailiang Cheng, Youqiong Li
OBJECTIVE: This study aimed to ascertain the safe range from foramen rotundum to the siphon of internal carotid artery using three-dimensional reconstruction technique. METHODS: We scanned skulls of 121 volunteers to get the final results with thin-section computed tomographic image. RESULTS: The distance of AC was measured as 13.22 (3.79) mm (range, 8.33-105.67 mm; 95% CI [confidence interval], 8.55-21.39 mm). The angle to the sagittal plane was measured as 33...
October 2015: Journal of Craniofacial Surgery
Ye Cheng, Haiyang Xu, Yong Chen, Songbai Xu, Hongquan Yu, Siwen Zhang, Yan Feng, Gang Zhao
PURPOSE: The aim of this study is to locate pterygopalatine fossa (PPF) and the opening of its communicating canals by accessing the relationship between PFF and the endoscopic landmarks such as the tubercular recess (TR) and middle lowest point of sellar floor (SF) as well as analyze the relation between PPF and important structures such as internal carotid artery (ICA) and optic canal (OC). MATERIALS AND METHODS: Computer topographic angiography (CTA) images of 118 PPF regions were reviewed...
September 2015: Journal of Craniofacial Surgery
H Kiyosue, S Tanoue, N Hongo, Y Sagara, H Mori
BACKGROUND AND PURPOSE: Some branches of the internal maxillary artery have anastomoses with the inferolateral trunk that are important as intracranial-extracranial collateral pathways and as dangerous anastomoses for transarterial embolization of these branches. We present here an undescribed branch potentially anastomosing with the anteromedial branch of the inferolateral trunk, which is provisionally named the artery of the superior orbital fissure, defined as an arterial branch from the pterygopalatine segment of the maxillary artery to the orbital apex at the superior orbital fissure...
September 2015: AJNR. American Journal of Neuroradiology
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