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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/28576607/extensiometric-analysis-of-strain-in-craniofacial-bones-during-implant-supported-palatal-expansion
#2
Carlos Nelson Elias, Daniel Jogaib Fernandes, Denis Souza Zanivan, Yuri Resende Fonseca
Palatal expansion has several orthodontic and orthopedic applications, such as increasing maxillary transverse dimensions and correcting maxillary atresia, oral breathing, and skeletal cross-bites. Little is known about the strain to which craniofacial bones are submitted when a palatal expander is loaded. The objectives of the present work were to propose a new palatal bone-borne titanium device (expansion screw), to determine patterns of strain distribution in craniofacial bones during palatal expansion and to show the clinical results of a new palatal expander supported by implants...
May 25, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28571176/juvenile-nasopharyngeal-angiofibroma-a-case-report
#3
Soubhagini Acharya, Choubarga Naik, Siddharth Panditray, Subha Soumya Dany
Juvenile nasopharyngeal angiofibroma is tumour almost exclusively seen in adolescent males, constituting less than 1% of all neoplasms in head and neck. They are benign and locally spreading and are highly vascular in nature and thus prove to be a surgical challenge because of its complex anatomical location. Here, we present a case report of a 18-year-old male presenting with a mass in his left nasal cavity, with recurrent epistaxis and nasal obstruction. Computed tomography imaging revealed a non-encapsulated lobulated heterogeneous mass lesion in the naso-pharynx and left posterior choana of the nasal cavity, extending to pterygopalatine and infratemporal fossa, masseter space of left side...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28556192/microsurgical-anatomy-of-the-maxillary-artery-for-extracranial-intracranial-bypass-in-the-pterygopalatine-segment-of-the-maxillary-artery
#4
O Akiyama, A Güngör, E H Middlebrooks, A Kondo, H Arai
The extracranial-intracranial (EC-IC) bypass using the maxillary artery (MA) has been successfully completed using a radial artery graft but the complicated anatomy and narrow exposure make it difficult. The purpose of this article is to define the microsurgical exposure of the MA through the middle fossa and describe the branches, diameter, and length of the MA available for the EC-IC bypass in the sphenopalatine fossa and anterior part of the infratemporal fossa. 5 cadaveric specimens were dissected bilaterally (10 MA dissections) to define the microsurgical anatomy of the MA through an intracranial approach...
May 27, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28535658/-value-of-the-endoscopic-diagnosis-on-the-lesions-of-the-skull-base-in-postradiotherapeutic-patients-with-nasopharyngeal-carcinoma
#5
J Y Lyu, F Y Liang, P Han, X M Huang
Objective: To evaluate the diagnostic value of the endoscopic biopsy operation to the lesions of the skull base in the patients with nasopharyngealcarcinoma after radiotherapy. Methods: From February 2006 to February 2010, 84 patients with nasopharyngeal carcinoma suffered from the lesions of the skull base after radiotherapy were included in this study. The relationship between the pathologic results of endoscopic biopsies from the skull base and the imaging results by Magnetic Resonance Imaging(MRI) was compared and discussed...
May 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28521351/the-endoscopic-endonasal-transmaxillary-approach-to-meckel-s-cave-through-the-inferior-orbital-fissure
#6
Xin Zhang, Halima Tabani, Ivan El-Sayed, Matthew Russell, Xuequan Feng, Arnau Benet
BACKGROUND: Surgical access to Meckel's Cave (MC) is challenging due to its deep location and surrounding important neurovascular structures. Currently existing endoscopic endonasal (EE) approaches require dissecting near the internal carotid artery (ICA) or require transposition of the pterygopalatine neurovascular bundle. OBJECTIVE: To describe a novel approach to access the anterolateral aspect of the MC using a minimally invasive EE route. METHODS: The EE transmaxillary transinferior orbital fissure approach was simulated in 10 specimens...
June 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28487042/recurrent-plexiform-schwannoma-involving-the-carotid-canal
#7
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/28434957/amygdalohippocampectomy-via-the-lateral-extended-transsphenoidal-endoscopic-approach-through-the-pterygopalatine-fossa-anatomic-study
#8
Pavel Kalinin, Oleg Sharipov, Maxim Kutin, Dmitry Fomichev, Andreis Gavrjushin, Georgiy Polev, Yevgeny Shults, Klementina Avdeeva
No abstract text is available yet for this article.
April 18, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28416992/sphenopalatine-ganglion-block-for-relieving-postdural-puncture-headache-technique-and-mechanism-of-action-of-block-with-a-narrative-review-of-efficacy
#9
REVIEW
Abhijit S Nair, Basanth Kumar Rayani
The sphenopalatine ganglion (SPG) is a parasympathetic ganglion, located in the pterygopalatine fossa. The SPG block has been used for a long time for treating headaches of varying etiologies. For anesthesiologists, treating postdural puncture headaches (PDPH) has always been challenging. The epidural block patch (EBP) was the only option until researchers explored the role of the SPG block as a relatively simple and effective way to treat PDPH. Also, since the existing evidence proving the efficacy of the SPG block in PDPH is scarce, the block cannot be offered to all patients...
April 2017: Korean Journal of Pain
https://www.readbyqxmd.com/read/28345519/anatomical-landmarks-for-maxillary-nerve-block-in-the-pterygopalatine-fossa-a-radiological-study
#10
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/28324181/trigeminocardiac-reflex-during-endoscopic-juvenile-nasopharyngeal-angiofibroma-surgery-an-appraisal
#11
Shilpee Bhatia Sharma, Trichy Narayanan Janakiram, Hina Baxi, Balamurugan Chinnasamy
Juvenile nasopharyngeal angiofibroma is a locally aggressive benign tumour which has propensity to erode the skull base. The tumour spreads along the pathways of least resistance and is in close proximity to the extracranial part of trigeminal nerve. Advancements in expanded approaches for endoscopic excision of tumours in infratemporal fossa and pterygopalatine fossa increase the vulnerability for the trigeminocardiac reflex. The manipulation of nerve and its branches during tumour dissection can lead to sensory stimulation and thus inciting the reflex...
March 21, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28262968/early-life-pb-exposure-and-its-effect-on-later-life-retinal-degeneration
#12
Shweta Modgil, Swaranjit Singh Cameotra, Vijay Lakshmi Sharma, Akshay Anand
The study presents the longitudinal effect of early life lead exposure on retinal ischemia. Swiss albino mice were exposed to lead acetate at two different timepoints viz. postnatal day 1-20 and at 7(th) week of age. These mice were then followed till 10 week of age and subjected to retinal ischemia. Retinal ischemia was induced using pterygopalatine artery ligation. The effect of prior lead exposure on ischemic insult was determined using various histological and molecular parameters. Although toxic effects of Pb are well reported, but the results in this study showed not much significant effect of early life Pb exposure on later life retinal degeneration...
March 6, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28236426/adenoid-cystic-carcinoma-of-maxillary-sinus-misdiagnosed-as-chronic-apical-periodontitis
#13
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/28230590/modified-lateral-surgical-approach-to-the-pterygopalatine-fossa
#14
Masataka Uehara, Masaaki Sasaguri, Shunji Shiiba, Kazuhiro Tominaga
Oral cancer, especially that originates in the maxillary tuberosity, buccal mucosa, and maxillary alveolus, is apt to invade the pterygopalatine fossa, where an intraoral approach is nearly impossible. There are 2 main types of extraoral approach to the pterygopalatine fossa; the anterior approach and the lateral approach. Although the lateral approach has an advantage compared with the anterior approach in terms of cosmetics, after the operation numbness of the lower lip occurs due to the sacrifice of the mental nerve...
June 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28210901/transplantation-of-lineage-negative-stem-cells-in-pterygopalatine-artery-ligation-induced-retinal-ischemia-reperfusion-injury-in-mice
#15
Gillipsie Minhas, Sudesh Prabhakar, Ryuichi Morishita, Munehisa Shimamura, Reema Bansal, Akshay Anand
Retinal ischemia is a condition associated with retinal degenerative diseases such as glaucoma, diabetic retinopathy, and other optic neuropathies, leading to visual impairment and blindness worldwide. Currently, there is no therapy available for ischemic retinopathies. Therefore, the aim of this study was to test a murine model of pterygopalatine artery ligation-induced retinal injury for transplantation of mouse bone marrow-derived lineage-negative (lin-ve) stem cells. The mouse external carotid artery and pterygopalatine artery were ligated for 3...
May 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28191601/the-maxillary-artery-and-its-variants-an-anatomical-study-with-neurosurgical-applications
#16
Jorge E Alvernia, Joaquin Hidalgo, Marc P Sindou, Chad Washington, Gustavo Luzardo, Eddie Perkins, Remi Nader, Patrick Mertens
BACKGROUND: The maxillary artery (MA) has gained attention in neurosurgery particularly in cerebral revascularization techniques, intracranial endonasal approaches and endovascular procedures. OBJECTIVES: To describe and illustrate the anatomy of the MA and its neurosurgical importance in a detailed manner. METHODS: Six cadaveric heads (12 MAs) were injected with latex. The arteries and surrounding structures were dissected and studied using microsurgical techniques...
February 13, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28162242/endoscopic-resection-of-pterygopalatine-fossa-and-infratemporal-fossa-malignancies
#17
REVIEW
Gretchen M Oakley, Richard J Harvey
The endoscopic resection of pterygopalatine and infratemporal fossa malignancies allows excellent visualization and manipulation of tissues in an anatomically complex area compared with open approaches. With less approach morbidity, endoscopic endonasal surgery allows an easier recovery and earlier transition to adjuvant radiotherapy. The endoscopic approach is minimal access but rarely minimally invasive. Surgeons should not hesitate to gain wide surgical exposure of the pterygopalatine, infratemporal fossa, and petrocavernous carotid artery to ensure comfortable maneuverability and easy visualization of the tumor and its normal tissue margins...
February 2, 2017: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/28106694/the-endoscopic-prelacrimal-recess-approach-to-the-pterygopalatine-fossa-and-infratemporal-fossa
#18
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/27932266/pterygopalatine-fossa-not-a-mystery
#19
Betul Emine Derinkuyu, Oznur Boyunaga, Cigdem Oztunali, Ayse Gul Alimli, Murat Ucar
The pterygopalatine fossa is an important anatomic crossroads that is connected with numerous intra- and extracranial spaces via foramina and fissures. Although this fossa is small, its central location in the skull base and its communications provide clinical, radiological, and anatomical significance. In this pictorial review, we aimed to describe the radiologic anatomy of the pterygopalatine fossa, as well as to give some pathologic examples to better understand this major conduit.
May 2017: Canadian Association of Radiologists Journal, Journal L'Association Canadienne des Radiologistes
https://www.readbyqxmd.com/read/27843320/a-modification-of-intraluminal-middle-cerebral-artery-occlusion-reperfusion-model-for-ischemic-stroke-with-laser-doppler-flowmetry-guidance-in-mice
#20
Qiang Cai, Gang Xu, Junhui Liu, Long Wang, Gang Deng, Jun Liu, Zhibiao Chen
Stroke is one of the common causes of death and disability in the world. The intraluminal middle cerebral artery occlusion/reperfusion (MCAO/R) model is a "gold standard" in surgical ischemic stroke models. Here, we optimized the procedure of this model by ligating on external carotid artery (ECA) stump and two ligatures prepared on internal carotid artery, which could improve the success and survival rate in mice. The results show that ECA approach was superior to common carotid artery approach. Meanwhile, we found that the exposure of pterygopalatine artery was not an essential step for MCAO/R model in mice...
2016: Neuropsychiatric Disease and Treatment
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