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Pterygopalatine canal

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https://www.readbyqxmd.com/read/28632604/reassessing-the-anatomic-origin-of-the-juvenile-nasopharyngeal-angiofibroma
#1
Colin D McKnight, Hemant A Parmar, Kuanwong Watcharotone, Suresh K Mukherji
OBJECTIVE: A modern imaging review is necessary to further define the anatomic origin of the juvenile nasopharyngeal angiofibroma. METHODS: After institutional review board approval, a search from January 1998 to January 2013 yielded 33 male patients (aged 10-23 years) with pathologically proven juvenile nasopharyngeal angiofibroma lesions, as well as pretreatment computed tomography/magnetic resonance imaging. Juvenile nasopharyngeal angiofibroma involvement was assessed in the following regions: sphenopalatine foramen, pterygopalatine fossa, vidian canal, nasopharynx, nasal cavity, sphenoid sinus, choana, pterygomaxillary fissure/masticator space, orbit, and sphenoid bone...
June 20, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28487042/recurrent-plexiform-schwannoma-involving-the-carotid-canal
#2
Kei Ijichi, Masahiro Muto, Ayako Masaki, Shingo Murakami
Plexiform schwannoma (PS) is a rare variety of benign nerve sheath tumor characterized by a multinodular plexiform growth pattern. PS is usually confined to the head and neck or skin. The pre-operative diagnosis of PS is difficult, and this has lead to a common misdiagnosis as a schwannoma. In addition, studies have indicated that an incomplete resection of PS often results in tumor recurrence. Here we describe a rare case of PS presented in the parapharyngeal space. Our case involved a 36-year-old man with swelling of the pharynx, who presented with a soft cervical mass...
May 6, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28345519/anatomical-landmarks-for-maxillary-nerve-block-in-the-pterygopalatine-fossa-a-radiological-study
#3
S Carrier, B Castagneyrol, L Beylacq, K Nouette-Gaulain, M Montaudon, M Laurentjoye
INTRODUCTION: The aim of this study was to describe the anatomical landmarks for maxillary nerve block in the pterygopalatine fossa. The risk of injury to the skull base and maxillary artery was assessed. METHODS: This retrospective study was based on the analysis of 61 consecutive computed tomography angiographies obtained from patients suffering from different pathologies. Anatomical relationships between optic canal (OC), foramen rotundum (FR), inferior orbital fissure (IOF) and puncture point (PP) were assessed...
April 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28236426/adenoid-cystic-carcinoma-of-maxillary-sinus-misdiagnosed-as-chronic-apical-periodontitis
#4
So-Young Park, Chien-Yun Pi, Euiseong Kim, Yoon Lee
Sometimes pain originating from a non-odontogenic pathologic condition is mistaken as endodontic illness, leading to misdiagnosis. The patient can misinterpret the pain as originating from a site different from the actual site, which is known as referred pain. However, the clinician managing pain in the orofacial region needs to be well-informed about the typical signs and symptoms of non-odontogenic diseases and to be able to make the correct referral when necessary for proper diagnosis and treatment. A 43-year-old man presented to the department of conservative dentistry complaining of dental pain...
June 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28106694/the-endoscopic-prelacrimal-recess-approach-to-the-pterygopalatine-fossa-and-infratemporal-fossa
#5
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
https://www.readbyqxmd.com/read/27837265/unusual-foramen-in-the-middle-cranial-fossae-of-adult-black-south-african-skull-specimens
#6
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
https://www.readbyqxmd.com/read/27833777/radio-anatomical-study-of-the-greater-palatine-canal-and-the-pterygopalatine-fossa-in-a-lebanese-population-a-consideration-for-maxillary-nerve-block
#7
Georges Aoun, Ibrahim Nasseh, Sayde Sokhn
AIM: The aim of this study was to describe the morphology of the component, greater palatine canal-pterygopalatine fossa (GPC-PPF), in a Lebanese population using cone-beam computed tomography (CBCT) technology. MATERIALS AND METHODS: CBCT images of 79 Lebanese adult patients (38 females and 41 males) were included in this study, and a total of 158 cases were evaluated bilaterally. The length and path of the GPCs-PPFs were determined, and the data obtained analyzed statistically...
2016: Journal of Clinical Imaging Science
https://www.readbyqxmd.com/read/27741209/pterygopalatine-fossa-anatomy-for-a-surgical-approach-to-sphenopalatine-ganglion
#8
Russell S Frautschi, Brianna Halasa, Susan Orra, Karolina Mlynek, Charles P Steiner, Francis A Papay
The sphenopalatine ganglion is an extracranial neural structure within the pterygopalatine fossa. Modulation of this region via implantation of a neuromodulatory device presents a novel therapy for the treatment of facial and head pain. Yet sex, race, and genetic factors contribute to morphological variations between individuals. This study defines the standards and variations of the bony landmarks surrounding the pterygopalatine fossa. One hundred dry skulls were analyzed from the Hamann-Todd osteological collection...
October 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/26943844/infraorbital-nerve-a-surgically-relevant-landmark-for-the-pterygopalatine-fossa-cavernous-sinus-and-anterolateral-skull-base-in-endoscopic-transmaxillary-approaches
#9
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
https://www.readbyqxmd.com/read/26887995/-surgical-anatomy-technique-and-application-of-endoscopic-endonasal-transpterygoid-approach-in-skull-base-surgery
#10
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
https://www.readbyqxmd.com/read/26831327/the-posterior-groove-as-a-landmark-for-location-of-the-palatovaginal-canal-in-axial-computed-tomography
#11
Qingguo Meng, Yongtian Lu, Li Shi, Yi Lei
PURPOSE: To investigate use of posterior groove of palatovaginal (PV) canal as an anatomic landmark in determining the location of PV canal in axial computed tomography (CT) images of pterygopalatine fossa (PPF). METHODS: A total of 20 skull specimens were examined in this analysis. Each skull was scanned by CT with and without a probe inserted through PV canal to measure the anatomic structures. CT images of 70 patients were used for comparing the rate of correct location of PV canal between the conventional method (using the vidian canal as a landmark) and the method of using the posterior groove as a landmark...
September 2016: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/26355981/location-of-pterygopalatine-fossa-and-its-relationships-to-the-structures-in-sellar-region
#12
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
https://www.readbyqxmd.com/read/26309612/morphological-study-of-the-pterygoid-canal-with-high-resolution-ct
#13
Junrong Chen, Jiahe Xiao
The purpose of our study was to accurately visualize and measure the normal anatomy and size of the pterygoid canal with thin-section (0.5 mm), high-resolution computed tomography (HRCT) as well as multiplanar reconstruction (MPR) and curved planar reconstruction (CPR) technologies to obtain credible and comprehensive information for clinical management. Both axial HRCT and MPR images of the pterygopalatine fossa were obtained in 167 normal adult subjects, who exhibited variable positions of pterygoid canal relative to the sphenoid sinus floor and cavity...
2015: International Journal of Clinical and Experimental Medicine
https://www.readbyqxmd.com/read/26052982/endoscopic-transnasal-approach-for-resection-of-locally-aggressive-tumors-in-the-orbit
#14
Masahiro Shin, Kenji Kondo, Shunya Hanakita, Keigo Suzukawa, Taichi Kin, Masaaki Shojima, Daichi Nakagawa, Nobuhito Saito
OBJECT: In recent years, application of endoscopic transnasal surgery (ETS) has been expanded to orbital lesions, and preliminary results have started to be published for medially located soft mass lesions. However, reports on experience with endoscopic intraorbital surgery aimed at resection of invasive skull base tumors remains quite limited. This report presents the authors' experience with ETS for locally aggressive tumors involving the orbit. METHODS: ETS was performed for 15 cases of aggressive tumors involving the orbit: 5 meningiomas (meningothelial, n = 3; atypical, n = 1; anaplastic, n = 1), 4 chordomas, 2 chondrosarcomas, and 4 others (metastasis from systemic myxofibrosarcoma, schwannoma, inverted papilloma, and acinic cell carcinoma, n = 1 each)...
September 2015: Journal of Neurosurgery
https://www.readbyqxmd.com/read/25888820/the-ct-and-mri-observations-of-small-cell-neuroendocrine-carcinoma-in-paranasal-sinuses
#15
Qingqiang Zhu, Wenrong Zhu, Jingtao Wu, Hongying Zhang
BACKGROUND: Primary small cell neuroendocrine carcinoma (SNEC) of paranasal sinuses is an extremely rare malignant tumor known for its aggressive clinical behavior. METHODS: Nineteen patients with SNEC in paranasal sinuses by magnetic resonance imaging (MRI) (n = 19) and computerized tomography (CT) and MRI (n = 18) were retrospectively studied. CT and MRI were undertaken to investigate tumor features. RESULTS: The lesions were located in the ethmoidal sinus (n = 6), maxillary sinus (n = 4), and bilateral sphenoid sinus (n = 9)...
2015: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/25795191/three-dimensional-computed-tomographic-evaluation-of-bilateral-sagittal-split-osteotomy-lingual-fracture-line-and-le-fort-i-pterygomaxillary-separation-in-orthognathic-surgery-using-cadaver-heads-ultrasonic-osteotome-versus-conventional-saw
#16
COMPARATIVE STUDY
Sophie Dammous, Quentin Dupont, Roland Gilles
PURPOSE: The purpose of this study was to observe the quality of the fracture line on the lingual side of the mandible after sagittal split osteotomy and the quality of pterygomaxillary separation after Le Fort I osteotomy using the BoneScalpel ultrasonic osteotome. MATERIALS AND METHODS: Bimaxillary procedures, according to the standard protocol, were performed using 10 fresh cadaver heads. The ultrasonic osteotome was used in the study group, and a reciprocating saw was used in the control group...
June 2015: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/25744352/the-vidian-canal-radiological-features-in-japanese-population-and-clinical-implications
#17
David Mato, Hajime Yokota, Seiichiro Hirono, Juan Martino, Naokatsu Saeki
The vidian canal (VC), a bony tunnel in which the vidian artery and nerve pass, has been widely known as an important landmark to identify the anterior genu of the petrous carotid artery (AGPCA) especially during lateral extended endoscopic endonasal approachs (LEEEAs). The objectives of this study in the Japanese population are to describe the radiological anatomic features and relationships between VC and its surrounding structures, and discuss the clinical implications. We studied 231 high-resolution computed tomography (CT) scans with a slice thickness of 0...
2015: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/25496623/endonasal-endoscopic-approaches-to-the-paramedian-skull-base
#18
REVIEW
Danielle de Lara, Leo F S Ditzel Filho, Daniel M Prevedello, Ricardo L Carrau, Pornthep Kasemsiri, Bradley A Otto, Amin B Kassam
OBJECTIVE: To describe the technical and anatomic nuances related to endoscopic endonasal approaches (EEAs) to the paramedian skull base. METHODS: Surgical indications, limitations, and technical aspects pertaining to EEAs designed to access areas oriented in the coronal plane are systematically reviewed with special attention to caveats, pitfalls, and common complications and how to avoid them. Case examples are presented. RESULTS: The paramedian skull base may be divided into anterior (corresponding to the orbit and its contents), middle (corresponding to the middle cranial, pterygopalatine, and infratemporal fossae), and posterior (includes the craniovertebral junction lateral to the occipital condyles and the jugular foramen) segments...
December 2014: World Neurosurgery
https://www.readbyqxmd.com/read/25487581/-endoscopic-skull-base-surgery-under-the-guidance-of-image-navigation-technology
#19
Bo Yan, Qiuhang Zhang, Haili Lyu, Mingxia Zhang, Lianjie Cao, Wei Wei, Pu Li, JinFei Su
OBJECTIVE: To investigate the feasibility of image navigation technology in endoscopic skull base surgery. METHODS: This study consisted of 75 patients who underwent the endoscopic operations with the help of the image navigation system by the same surgeon between March 2010 and March 2013. The time to prepair image navigation system, identifying anatomical structure, complications, tumor resection, and follow-up results were analysed. RESULTS: The application of image navigation technology in the endoscopic skull base operations was both safe and reliable for delineation of tumors and identification of vital structures hidden or encased by the tumors, such as internal carotid artery, optic canal, comb, saddle bottom, foramen rotundum, foramen ovale, foramen lacerum, jugular foramen, cerebral dura mater...
September 2014: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/25467526/computed-tomography-morphometric-analysis-of-the-greater-palatine-canal-a-study-of-1-500-head-ct-scans-and-a-systematic-review-of-literature
#20
Iwona M Tomaszewska, Elizabeth K Kmiotek, Iwona Z Pena, Michał Średniawa, Katarzyna Czyżowska, Robert Chrzan, Michał Nowakowski, Jerzy A Walocha
We have performed a detailed morphometric analysis of the length and anatomic routes of the greater palatine canal (GPC) and a systematic review of the literature on the anatomy of the GPC with the aim of informing dentists, maxillofacial surgeons, otorhinolaryngologists and other specialists performing procedures in the area of the GPC. In total, we analysed 1,500 archived adult head computed tomography scans to determine the length of the GPC and of the routes on both sides, as well as the dimensions and opening directions of the greater palatine foramen...
September 2015: Anatomical Science International
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