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Onodi cell

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https://www.readbyqxmd.com/read/27643765/the-preoperative-sinus-ct-avoiding-a-close-call-with-surgical-complications
#1
William T O'Brien, Stefan Hamelin, Erik K Weitzel
Although functional endoscopic sinus surgery is an effective means of treating patients with recurrent and refractory sinusitis, the procedure is not without risk of serious surgical complications. Preoperative computed tomography (CT) affords radiologists the opportunity to prospectively identify anatomic variants that predispose patients to major surgical complications; however, these critical variants are not consistently evaluated or documented on preoperative imaging reports. The purpose of this review is to illustrate important anatomic variants and landmarks on the preoperative sinus CT with a focus on those that predispose patients to surgical complications...
October 2016: Radiology
https://www.readbyqxmd.com/read/27340631/importance-of-ct-scan-of-paranasal-sinuses-in-the-evaluation-of-the-anatomical-findings-in-patients-suffering-from-sinonasal-polyposis
#2
Himanshu Varshney, Jitendra Varshney, Subhradev Biswas, S K Ghosh
Sinonasal polyps are benign lesions arising from nose and/or sinuses mucosa. Paranasal sinuses computed tomogram (CT) scan are important for functional endoscopic sinus surgery (FESS) as their information assist the surgeon in pre-operative planning. This study aimed to show importance of CT scan in evaluation of anatomical variations to prove a correlation with disease process and extent of disease in sinonasal polyposis patients. A study was done from Sept, 2010 to Sept, 2011 with 33 patients presenting with nasal polyps...
June 2016: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/27161189/the-role-of-onodi-cells-in-sphenoiditis-results-of-multiplanar-reconstruction-of-computed-tomography-scanning
#3
Mehmet Senturk, Ibrahim Guler, Isa Azgin, Engin Umut Sakarya, Gultekin Ovet, Necat Alatas, Ismet Tolu, Omer Erdur
INTRODUCTION: Onodi cells are the most posterior ethmoid air cells and extend superolateral to the sphenoid sinus. These cells are also intimately related with the sphenoid sinus, optic nerve, and carotid artery. Radiologic evaluation is mandatory to assess for anatomic variations before any treatment modalities related to the sphenoid sinus. OBJECTIVE: To evaluate the effect of Onodi cells on the frequency of sphenoiditis. METHODS: A retrospective analysis was performed in 618 adult patients who underwent high-resolution computed tomography between January 2013 and January 2015...
April 20, 2016: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/27146614/radiological-sinonasal-anatomy-exploring-the-saudi-population
#4
Redha A Alrumaih, Mona M Ashoor, Ahmed A Obidan, Khulood M Al-Khater, Saeed A Al-Jubran
OBJECTIVES: To assess the prevalence of common radiological variants of sinonasal anatomy among Saudi population and compare it with the reported prevalence of these variants in other ethnic and population groups.  METHODS: This is a retrospective cross-sectional study of 121 computerized tomography scans of the nose and paranasal sinuses of patients presented with sinonasal symptoms to the Department of Otorhinolarngology, King Fahad Hospital of the University, Khobar, Saudi Arabia, between January 2014 and May 2014...
May 2016: Saudi Medical Journal
https://www.readbyqxmd.com/read/26663153/anatomic-variation-in-the-pterygopalatine-angle-of-the-maxillary-sinus-and-the-maxillary-bulla
#5
C Craiu, M C Rusu, S Hostiuc, M Săndulescu, A I Derjac-Aramă
Bulges of the most posterior ethmoid air cells into the maxillary sinus were termed maxillary bullæ by Onodi. With few exceptions, they have since been ignored by anatomists through time. Likewise, Sieur cells-the spheno-ethmoido-maxillary air cells-are uncommonly found in anatomical texts. We therefore aimed to perform a retrospective cone beam computed tomography study on 50 patients to document the possibilities of anatomic variation in the situs of the orbital process of palatine bone-a variation related anatomically with the pterygopalatine fossa (PPF) and the respective angle of the maxillary sinus...
January 2017: Anatomical Science International
https://www.readbyqxmd.com/read/26648396/single-cell-dynamics-causes-pareto-like-effect-in-stimulated-t-cell-populations
#6
Jérémie Cosette, Alice Moussy, Fanny Onodi, Adrien Auffret-Cariou, Thi My Anh Neildez-Nguyen, Andras Paldi, Daniel Stockholm
Cell fate choice during the process of differentiation may obey to deterministic or stochastic rules. In order to discriminate between these two strategies we used time-lapse microscopy of individual murine CD4 + T cells that allows investigating the dynamics of proliferation and fate commitment. We observed highly heterogeneous division and death rates between individual clones resulting in a Pareto-like dominance of a few clones at the end of the experiment. Commitment to the Treg fate was monitored using the expression of a GFP reporter gene under the control of the endogenous Foxp3 promoter...
December 9, 2015: Scientific Reports
https://www.readbyqxmd.com/read/26097234/identification-of-onodi-cell-and-new-classification-of-sphenoid-sinus-for-endoscopic-sinus-surgery
#7
REVIEW
Kota Wada, Hiroshi Moriyama, Hideo Edamatsu, Takanori Hama, Chiaki Arai, Hiromi Kojima, Nobuyoshi Otori, Kiyoshi Yanagi
BACKGROUND: There is no effective classification method for the opening of the sphenoid sinus. The objective of this study was to examine the effectiveness of identification of the Onodi cell and classification of the sphenoid sinus using sagittal computed tomography (CT) for sphenoidotomy. METHODS: CT images of the sinuses of surgical patients (n = 261; 522 sides) were studied. Using sagittal CT, the relationships between the lateral side of the anterior wall of the sphenoid sinus and the optic nerve, and between the middle of the anterior wall of the sphenoid sinus and the skull base or pituitary gland were studied...
November 2015: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/25990686/anatomical-variants-of-surgically-important-landmarks-in-the-sphenoid-sinus-a-radiologic-study-in-southeast-asian-patients
#8
B Anusha, A Baharudin, R Philip, S Harvinder, B Mohd Shaffie, R R Ramiza
PURPOSE: Failure of a surgeon to understand the local variations of the anatomical landmarks of the sphenoid sinus is a potential risk factor to cause damage to the optic nerve (ON) or internal carotid artery (ICA) that lies on the walls of the sphenoid sinus. The aim of this study was to identify the anatomical variants of the sphenoid sinus and its related surrounding structures among the Southeast Asian (SEA) population, based on computed tomography (CT) scans. MATERIALS AND METHODOLOGY: This cross-sectional study analyzed 300 CT scans of the brain, paranasal sinuses (PNS), and head and neck (H&N) at a tertiary referral centre in Malaysia utilizing the Osirix software...
December 2015: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/25935058/-does-onodi-cell-limit-the-exposure-of-sella-during-transsphenoidal-pituitary-surgery
#9
Abdulkadir İmre, Ercan Pinar, Nurullah Yüceer, Murat Songu, Yüksel Olgun, İbrahim Aladağ
OBJECTIVES: This study aims to evaluate the association between the presence of Onodi cell and sella exposure during endonasal endoscopic transsphenoidal pituitary surgery (EETPS). PATIENTS AND METHODS: Forty-two patients who underwent EETPS for a pituitary adenoma with the collaboration of Neurosurgery and Otorhinolaryngology Departments at Katip Çelebi University Atatürk Training and Research Hospital between February 2011 and March 2014 were retrospectively analyzed...
2015: Kulak Burun Boğaz Ihtisas Dergisi: KBB, Journal of Ear, Nose, and Throat
https://www.readbyqxmd.com/read/25187315/peroxisome-proliferator-activated-receptor-%C3%AE-and-thymic-stromal-lymphopoietin-are-involved-in-the-pathophysiology-of-childhood-coeliac-disease
#10
Erna Sziksz, Kriszta Molnár, Rita Lippai, Domonkos Pap, Anna Onody, Apor Veres-Székely, Péter Vörös, Dolóresz Szabó, Hajnalka Győrffy, Gábor Veres, Tivadar Tulassay, Adám Vannay, András Arató
Celiac disease (CD) is a chronic autoimmune enteropathy caused by exposure to dietary gluten in genetically predisposed individuals. The transcription factor peroxisome proliferator-activated receptor gamma (PPARγ) was shown to exert protective effects in several immune-mediated disorders. Activation of PPARγ suppressed the expression of thymic stromal lymphopoietin (TSLP), an inducer of proinflammatory cytokines. Since the role of TSLP in gluten-sensitive enteropathy is completely unknown, we investigated the involvement of TSLP and its regulator PPARγ in childhood CD...
October 2014: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/25143184/how-i-do-it-the-endoscopic-endonasal-optic-nerve-and-orbital-apex-decompression
#11
Timothée Jacquesson, Lucie Abouaf, Moncef Berhouma, Emmanuel Jouanneau
BACKGROUND: With the refinement of the technique, endoscopic endonasal surgery increases its field of indications. The orbital compartment is among the locations easily reached through the nostril. This anteromedial approach has been described primarily for inflammatory or traumatic diseases, with few data for tumoral diseases. METHOD: Since 2010, this route has been used at our institution either for decompression or for biopsy of orbital tumoral diseases. FINDINGS/CONCLUSIONS: Even if further studies are warranted, this strategy proved to be beneficial for patients, with improvements in visual outcome...
October 2014: Acta Neurochirurgica
https://www.readbyqxmd.com/read/25032111/sinonasal-anatomical-variations-their-relationship-with-chronic-rhinosinusitis-and-effect-on-the-severity-of-disease-a-computerized-tomography-assisted-anatomical-and-clinical-study
#12
Ahmet Kaygusuz, Mehmet Haksever, Davut Akduman, Sündüs Aslan, Zeynep Sayar
ABSTRACT: The anatomy of the sinonasal area has a very wide rage of anatomical variations. The significance of these anatomical variations in pathogenesis of rhinosinusitis, which is the commonest disease in the region, is still unclear. The aims of the study were to compare the rate of sinonasal anatomical variations with development and severity of chronic rhinosinusitis patients. CT scan of paranasal sinuses images of 99 individuals were retrospectively reviewed. 65 cases of chronic rhinosinusitis (study group) who had undergone endoscopic sinus surgery were compared with 34 cases without chronic rhinosinusitis (control group)...
September 2014: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/24959426/a-cross-sectional-study-of-sphenoid-sinus-through-gross-and-endoscopic-dissection-in-north-karnataka-india
#13
Manisha S Chougule, Daksha Dixit
INTRODUCTION: Sphenoid sinus has got importance due to trans-sphenoid approach to the pituitary gland. This study is an attempt to know the variations in North Karnataka population, through cadaveric dissection and CT scan study. OBJECTIVE: We want to study variations in sphenoid sinus and its percentage in North Karnataka population. MATERIAL AND METHODS: Endoscopic examination and dissection of sphenoid sinus was carried out in 30 cadavers (three female and 27 male) using 0°, 30°, 70° rigid nasal endoscopes...
April 2014: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/24955266/blinding-orbital-apex-syndrome-due-to-onodi-cell-mucocele
#14
Efrat Fleissig, Oriel Spierer, Ilan Koren, Igal Leibovitch
The onodi cell is a posterior ethmoidal cell that is pneumatized laterally or superiorly to the sphenoid sinus with close proximity to the optic nerve. A mucocele, a benign, expansile, cyst-like lesion of the paranasal sinuses, may uncommonly involve the onodi cell causing compression of the optic nerve and nearby structures. In this paper, we report a rare case of onodi cell mucocele causing orbital apex syndrome, with prompt recovery after endoscopic removal. However, optic neuropathy did not improve and the patient remained blind...
2014: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/24715937/clinically-significant-anatomical-variants-of-the-paranasal-sinuses
#15
Rashid Al-Abri, Deepa Bhargava, Wameedh Al-Bassam, Yahya Al-Badaai, Sukhpal Sawhney
OBJECTIVE: Anatomic structural variations of the paranasal sinuses have a practical significance during surgical procedures conducted on the sinuses by otolaryngologists. This study aims to evaluate the prevalence of clinically significant anatomical variations of the paranasal sinuses. METHODS: A prospective analysis of 435 computed tomography (CT) examinations of adult Omani patients was conducted to determine the prevalence of clinically significant anatomical variations of the paranasal sinuses...
March 2014: Oman Medical Journal
https://www.readbyqxmd.com/read/24627859/some-anatomical-variation-of-paranasal-sinuses-using-sinus-endoscopic-approach-on-cadaver-in-isfahan-iran
#16
Nezamoddin Berjis, Seyyed Mostafa Hashemi, Mehrdad Rogha, Maryam Abdollahi Biron, Mehrdad Setareh
BACKGROUND: Due to the anatomical variations of the paranasal sinuses and its great importance in sinus surgery, as this area is in very close proximity to vital structures including the optic nerve, carotid artery, and skull base, anatomical knowledge of this area is of high importance. The purpose of this study is defining a full and clear impression of paranasal sinus anatomy and its variations as a model for the human population of the country. MATERIALS AND METHODS: This study was conducted on 45 cadavers in Isfahan forensic Medicine center during 2010 to 2011...
2014: Advanced Biomedical Research
https://www.readbyqxmd.com/read/24621698/fungal-ball-within-onodi-cell-mucocele-causing-visual-loss
#17
Yong-Il Cheon, Sung-Lyong Hong, Hwan-Jung Roh, Kyu-Sup Cho
The Onodi cell is a pneumatized posterior ethmoid cell located laterally and superiorly to the sphenoid sinus and closely related to the optic nerve. A mucocele is a benign, expansile, cystlike lesion of the paranasal sinuses that is filled with mucoid secretion. Therefore, optic neuropathy caused by an infected mucocele in an Onodi cell is uncommon. Furthermore, fungal infection superimposed on an Onodi cell mucocele is extremely rare and has not been reported previously. Here, we describe the first case of fungal ball within Onodi cell mucocele causing visual loss, which was completely removed via transnasal endoscopic approach...
March 2014: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/24373273/characterization-of-sphenoid-sinuses-for-sudanese-population-using-computed-tomography
#18
Samih Awad Kajoak, Caroline Edward Ayad, Elasfi Ahmed Abdalla, Mohammed Najmeldeen Mohammed, Mohammed Omer Yousif, Alamin Musa Mohammed
The purpose of this study is to determine the anatomical features of the sphenoid sinus using computerized tomography (CT). 100 Sudanese subjects were investigated for CT sinuses; Characterization of the sphenoid sinus and seven horizontal and vertical measurements were evaluated. Onodi cell was found in 13 subjects, 10 of them were sellar and 3 were pre-sellar. Pneumatization was of the sellar type in 85 %, presellar was 15 %, and no subject was chonchal. The mean length of vertical lines from the center of sphenoid ostium to the roof and bottom were 10...
October 28, 2013: Global Journal of Health Science
https://www.readbyqxmd.com/read/24362681/analysis-of-sphenoid-sinus-in-the-operative-plane-of-endoscopic-transsphenoidal-surgery-using-computed-tomography
#19
Se Hwan Hwang, Young Hoon Joo, Jae Hyun Seo, Jin Hee Cho, Jun Myung Kang
Recently, the endoscopic transsphenoidal approach for sphenoid sinus or intracranial lesion has gained more popularity and the study of the surgical anatomy and relationships of the sphenoid sinus has gained increased significance. The aim of this study was to clarify the anatomical features of the sphenoid sinus including surrounding structures as seen in the operative view of endoscopic transsphenoidal surgery. The various distances in the sphenoid sinus as well as the relationships between the sphenoid sinus ostium (SO) and important structures such as the optic canal (OC) and carotid artery (CA) according to the presence of Onodi cell (sphenoethmoidal cell; Onodi group vs...
August 2014: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/23958835/-young-patient-with-acute-monolateral-amaurosis
#20
J Rueping, M Kramer, D Kook, A Kampik, M Ulbig, C Haritoglou
A 39-year-old patient presented with acute visual loss of the left eye. Although the initial ophthalmological and neurological examinations were uneventful, magnetic resonance imaging (MRI) showed optic canal narrowing and compression of the optic nerve secondary to a prominent posteriorly misplaced ethmoidal cell (so-called Onodi cell). Endonasal ethmoidectomy with decompression of the infected Onodi cell was performed. Microbiological testing showed growth of Haemophilus influenzae. Despite early surgical intervention vision could not be restored...
2014: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
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