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Onodi' cell

Thomas A Vo, Amy Patel, Chantal J Boisvert
No abstract text is available yet for this article.
June 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
M Kaya, F Çankal, M Gumusok, N Apaydin, I Tekdemir
OBJECTIVE: The aim of this study was to determine the frequency of anatomic variations of the paranasal sinuses and their roles in the development of sinusitis. MATERIALS AND METHODS: Computed tomography of paranasal sinuses of 350 patients was assessed in terms of anatomic variations and inflammatory sinus pathology. The coexistence of anatomic variations with sinusitis was statistically investigated. RESULTS: At least one anatomical variation of paranasal sinuses was detected in 325 patients (92...
November 2017: Nigerian Journal of Clinical Practice
Figen Tunalı Turkdogan, Kenan Ahmet Turkdogan, Murat Dogan, Mehmet Haydar Atalar
INTRODUCTION: Frequent and broad application of endoscopic sinus surgery (ESS) in parallel with experience makes it imperative to know the anatomy and the existing pathology very well before surgery. This study examines the association between anomalies in the sphenoid sinus area in paranasal sinuses computed tomography (PNS-CT) and pathological findings and determines variations of sphenoid sinus. METHODS: A total of 200 cases (100 women, 100 men) who had PNS-CT in the emergency and radiology polyclinics within the period of one year were included in this study...
2017: Pan African Medical Journal
Rishikesh Madhukar Itagi, Chaitra Parameshwara Adiga, Kiran Kalenahalli, Lakshmikanth Goolahally, Manju Gyanchandani
INTRODUCTION: Posterior paranasal sinuses consisting of posterior ethmoid and sphenoid sinuses show varying pneumatization and relationship to Optic Nerve Canal (ONC). Most commonly ONC is superolateral to sphenoid sinus, however varied protrusion of ONC into the sinuses may occur. Rarely it may pass completely through the sinus. Optic Nerve (ON) is covered by a thin bony layer or by periosteum and sinus mucosa without bone. Extensive pneumatization of sphenoid sinus and bony dehiscence predisposes to ON injury...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
Ali Tayebi Meybodi, Vera Vigo, Arnau Benet
This anatomic image demonstrates the sphenoethmoidal (Onodi) cell (a variant of the paranasal sinuses), the identification of which is critical to prevent neurovascular injury during endoscopic approaches to the sella and adjacent regions of the skull base.
July 2017: World Neurosurgery
L P Chmielik, A Chmielik
BACKGROUND: The Onodi cell (sphenoethmoidal air cell) is an anatomic variant of the most posterior ethmoid cell that pneumatised superiorly and laterally to the sphenoid sinus, and is in close relation to the optic nerve. The proper identification of the Onodi cell is essential during a pre-operative computer tomography (CT) examination, as the presence of that ethmoid cell variant makes sphenoid sinus surgery more risky. The bulging of the optic nerve to the ethmoid cell wall is well visualized during endoscopic examination, but there are no clearly defined criteria for a potentially dangerous Onodi cell type in CT examinations...
June 2017: International Journal of Pediatric Otorhinolaryngology
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
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
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...
January 2017: Brazilian Journal of Otorhinolaryngology
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
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
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
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
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
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
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
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
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
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
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
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