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Anatomy paranasal sinus

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https://www.readbyqxmd.com/read/29931532/variations-in-vascular-anatomy-and-unilateral-adrenal-agenesis-in-a-female-cadaver-with-situs-inversus-totalis
#1
Ana González-Castillo, Santiago Rojas, Marisa Ortega, Alfonso Rodríguez-Baeza
PURPOSE: Situs inversus totalis is mirror transposition of thoracic and abdominal organs. Very few reports have been published on anatomic dissections of cadavers with this condition. METHODS: This work describes a case of situs inversus totalis identified during the anatomical dissection of a 91-year-old woman. RESULTS: Thoracic and abdominal viscera were inverted, but otherwise normal. The aorta originated from the right ventricle, which exhibited characteristics of the systemic ventricle...
June 21, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29910174/cerebrospinal-fluid-rhinorrhea-and-otorrhea-a-multimodality-imaging-approach
#2
S B Hiremath, A A Gautam, V Sasindran, J Therakathu, G Benjamin
Cerebrospinal fluid (CSF) leaks are extracranial egress of CSF into the adjacent paranasal sinus or tympanomastoid cavity due to an osteodural defect involving skull base. It can be due to a multitude of causes including accidental or iatrogenic trauma, congenital malformations and spontaneous leaks. Accurate localization of the site of the leak, underlying causes and appropriate therapy is necessary to avoid associated complications. In this paper relevant anatomy, clinical diagnosis, imaging modalities and associated findings are discussed along with a brief mention about management...
June 14, 2018: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/29900774/identification-of-a-nasoconchal-paranasal-sinus-in-the-white-rhinoceros-ceratotherium-simum
#3
Mathew P Gerard, Zoe G Glyphis, Christine Crawford, Anthony T Blikslager, Johan Marais
  African rhinoceros are poached for their horns using indiscriminate and aggressive methods. Rhinoceros that survive these attacks often have severe facial trauma, and treatment is limited by a lack of understanding and published information of the normal anatomy. This study was performed to investigate and describe the anatomy of the most commonly injured area of the head of the white rhinoceros ( Ceratotherium simum). Two white rhinoceros cadaver heads were imaged by computed tomography and grossly dissected...
June 2018: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/29880289/a-computed-tomographic-analysis-of-frontal-recess-cells-in-association-with-the-development-of-frontal-sinusitis
#4
Hafizah Husna Johari, Irfan Mohamad, Ida Sadja'ah Sachlin, Mohd Ezane Aziz, Teoh Yuen Mey, Ramiza Ramza Ramli
OBJECTIVE: This study was done to determine frontal recess anatomy cell variations and its association with frontal sinusitis. The incidence of frontal recess cells in the population, the presence of frontal recess cell variations in chronic rhinosinusitis and non-chronic rhinosinusitis and the association of frontal recess cell variation in the development of frontal sinusitis were also assessed. METHODS: This was an observational, retrospective cross-sectional study of computed tomography (CT) scan of paranasal sinus that had been performed on patients in Hospital Universiti Sains Malaysia and Hospital Sultanah Bahiyah done from January 2009 until December 2016...
June 4, 2018: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29872547/imaging-review-of-the-anterior-skull-base
#5
Olivia Francies, Levan Makalanda, Dimitris Paraskevopolous, Ashok Adams
The anterior skull base (ASB) is intimately associated with the unique soft tissue subtypes of the nasal cavity, paranasal sinuses, orbits, and intracranial compartment. Pathology involving the ASB is rare but the causes are manifold and can be broadly subdivided into those intrinsic to the skull base and processes extending from below or above. Sinonasal pathology is the most commonly encountered and poses significant management challenges that rely heavily on accurate interpretation of the radiological findings...
May 2018: Acta Radiologica Open
https://www.readbyqxmd.com/read/29870437/anatomic-considerations-in-thyroid-eye-disease
#6
Jonathan J Dutton
PURPOSE: To review and summarize the clinical findings in thyroid eye disease (TED) related to the unique anatomical structures of the eyelids and orbit. METHODS: A PubMed search was performed searching for anatomical relationships between eyelid and orbital anatomy and the clinical findings of TED. RESULTS: The major clinical findings associated with TED are varied. They typically involve both the eyelid and the orbit. In the eyelid, usual findings include upper eyelid retraction, contour abnormalities, eyelid edema, prolapsed orbital fat, conjunctival injection and chemosis, caruncular edema, and meibomian gland dysfunction...
May 10, 2018: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29771086/-design-of-cross-sectional-anatomical-model-focused-on-drainage-pathways-of-paranasal-sinuses
#7
Y Zha, W Lv, Y L Gao, Z Z Zhu, Z Q Gao
Objective: To design and produce cross-sectional anatomical models of paranasal sinuses for the purpose of demonstrating drainage pathways of each nasal sinus for the young doctors. Method: We reconstructed the three-dimensional model of sinuses area based on CT scan data, and divided it into 5 thick cross-sectional anatomy models by 4 coronal plane,which cross middle points of agger nasi cell, ethmoid bulla, posterior ethmoid sinuses and sphenoid sinus respectively. Then a 3D printerwas used to make anatomical cross-sectional anatomical models...
May 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29602963/evaluation-of-superior-concha-bullosa-by-computed-tomography
#8
Kadri İla, Nihat Yilmaz, Serkan Öner, Efser Başaran, Zülal Öner
OBJECTIVE: Concha bullosa is generally regarded as pneumatisation of the middle turbinate in the nose. However, pneumatisation may also be seen in the superior and inferior turbinate. Computed tomography (CT) of paranasal sinuses is extremely helpful for the examination of this inaccessible area. Coronal CT sections of paranasal sinuses are particularly useful for surgical anatomy, as these images show nearly the same regions as the endoscopic examinations. The aim of this retrospective study was to evaluate the presence, incidence and unilaterality-bilaterality of superior turbinate pneumatisation and concomitant nasal pathologies...
March 30, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29552873/role-of-imaging-in-allergic-rhinology
#9
D Messineo, S Masieri, C Cavaliere
Rhinitis is an underestimated clinical condition, which has a considerable impact on the quality of life of the affected patients. The subject of this review focuses on three fundamental aspects: the development of knowledge concerning anatomic landmarks, the development of radiological imaging technology, and developments that can make a difference in the treatment of allergic rhinitis. The anatomical study of paranasal sinuses has been conducted since the time of the ancient Egyptians. Development of radiological equipment from the early 1900s has helped to improve information on the morphology of paranasal sinuses, sufficient to be considered valuable information regarding frontal anatomy and its variability...
January 2018: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29392047/vidian-canal-types-and-dehiscence-of-the-bony-roof-of-the-canal-an-anatomical-study
#10
Yakup Yeğin, Mustafa Çelik, Ahmet Altıntaş, Baver Maşallah Şimşek, Burak Olgun, Fatma Tülin Kayhan
Objective: To determine the prevalence of Vidian canal types and dehiscence of the bony roof of the canal. Methods: This study included 594 patients (391 males and 203 females; average age, 32.43±11.98 years; range, 18-65 years). Computed tomography (CT) images were analyzed in terms of the prevalence of Vidian canal types and dehiscence of the bony roof of the canal. Results: Vidian canal types 1, 2, and 3 based on the sphenoid sinus body were found on the right side in 33...
March 2017: Turkish Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/29238684/a-study-of-clinical-significance-of-the-depth-of-olfactory-fossa-in-patients-undergoing-endoscopic-sinus-surgery
#11
Ashok Murthy V, Bollineni Santosh
The endoscope has revolutionized the diagnosis and treatment of diseases of the nose and paranasal sinuses. Endoscopic sinus surgery (ESS), like all minimally invasive surgery, is designed to combine an excellent outcome with minimal patient discomfort. Successful outcome with minimal complications can only be achieved with good knowledge of the endoscopic anatomy, appropriate training in the procedure and the understanding of the anatomical variations. The intraoperative complications of ESS are bleeding and injury to surrounding structures commonly the orbital structures and fovea ethmoidalis...
December 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29211048/imaging-characteristics-of-malignant-sinonasal-tumors
#12
REVIEW
Masaya Kawaguchi, Hiroki Kato, Hiroyuki Tomita, Keisuke Mizuta, Mitsuhiro Aoki, Akira Hara, Masayuki Matsuo
Malignancies of the nasal cavity and paranasal sinuses account for 1% of all malignancies and 3% of malignancies of the upper aerodigestive tract. In the sinonasal tract, nearly half of all malignancies arise in the nasal cavity, whereas most of the remaining malignancies arise in the maxillary or ethmoid sinus. Squamous cell carcinoma is the most common histological subtype of malignant tumors occurring in this area, followed by other epithelial carcinomas, lymphomas, and malignant soft tissue tumors. Although many of these tumors present with nonspecific symptoms, each tumor exhibits characteristic imaging features...
December 6, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/29197432/predoctoral-and-postdoctoral-education-on-cone-beam-computed-tomography
#13
Allison Buchanan, Karan Thachil, Chris Haggard, Sajitha Kalathingal
OBJECTIVES: As the use of cone beam computed tomography (CBCT) in dentistry continues to grow, questions related to appropriate radiation safety, training, and interpretation arise. Recognizing this need, the American Dental Association published an advisory statement for the safe use of CBCT in dentistry and recommended that guidelines for appropriate training be established. The purpose of this study was to assess radiation safety concerns related to CBCT and identify voids in current education on CBCT for the predoctoral dental curriculum and continuing dental education...
December 2017: Journal of Evidence-based Dental Practice
https://www.readbyqxmd.com/read/29102154/three-dimensional-printer-generated-patient-specific-phantom-for-artificial-in-vivo-dosimetry-in-radiotherapy-quality-assurance
#14
Takeshi Kamomae, Hidetoshi Shimizu, Takayoshi Nakaya, Kuniyasu Okudaira, Takahiro Aoyama, Hiroshi Oguchi, Masataka Komori, Mariko Kawamura, Kazuhiro Ohtakara, Hajime Monzen, Yoshiyuki Itoh, Shinji Naganawa
Pretreatment intensity-modulated radiotherapy quality assurance is performed using simple rectangular or cylindrical phantoms; thus, the dosimetric errors caused by complex patient-specific anatomy are absent in the evaluation objects. In this study, we construct a system for generating patient-specific three-dimensional (3D)-printed phantoms for radiotherapy dosimetry. An anthropomorphic head phantom containing the bone and hollow of the paranasal sinus is scanned by computed tomography (CT). Based on surface rendering data, a patient-specific phantom is formed using a fused-deposition-modeling-based 3D printer, with a polylactic acid filament as the printing material...
December 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28828240/the-hidden-anatomy-of-paranasal-sinuses-reveals-biogeographically-distinct-morphotypes-in-the-nine-banded-armadillo-dasypus-novemcinctus
#15
Guillaume Billet, Lionel Hautier, Benoit de Thoisy, Frédéric Delsuc
BACKGROUND: With their Pan-American distribution, long-nosed armadillos (genus Dasypus) constitute an understudied model for Neotropical biogeography. This genus currently comprises seven recognized species, the nine-banded armadillo (D. novemcinctus) having the widest distribution ranging from Northern Argentina to the South-Eastern US. With their broad diversity of habitats, nine-banded armadillos provide a useful model to explore the effects of climatic and biogeographic events on morphological diversity at a continental scale...
2017: PeerJ
https://www.readbyqxmd.com/read/28822578/improving-rhinology-skills-with-simulation
#16
REVIEW
Andrew Y Lee, Marvin P Fried, Marc Gibber
The convergence of technology and medicine has led to many advances in surgical training. Novel surgical simulators have led to significantly improved skills of graduating surgeons, leading to decreased time to proficiency, improved efficiency, decreased errors, and improvement in patient safety. Endoscopic sinus surgery poses a steep learning curve given the complex 3-dimensional anatomy of the nasal and paranasal cavities, and the necessary visual-spatial motor skills and bimanual dexterity. This article focuses on surgical simulation in rhinological training and how innovative high-fidelity and low-fidelity simulators can maximize resident training and improve procedural skills before operating in the live environment...
October 2017: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/28819530/assessment-of-sphenoid-sinus-related-anatomic-variations-with-computed-tomography
#17
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
https://www.readbyqxmd.com/read/28614638/development-and-validation-of-a-3d-printed-model-of-the-ostiomeatal-complex-and-frontal-sinus-for-endoscopic-sinus-surgery-training
#18
Abdulaziz S Alrasheed, Lily H P Nguyen, Luc Mongeau, W Robert J Funnell, Marc A Tewfik
BACKGROUND: Endoscopic sinus surgery poses unique training challenges due to complex and variable anatomy, and the risk of major complications. We sought to create and provide validity evidence for a novel 3D-printed simulator of the nose and paranasal sinuses. METHODS: Sinonasal computed tomography (CT) images of a patient were imported into 3D visualization software. Segmentation of bony and soft tissue structures was then performed. The model was printed using simulated bone and soft tissue materials...
August 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28582957/a-case-of-organizing-hematoma-in-a-maxillary-sinus-after-reconstruction-of-a-blow-out-fracture
#19
Sang Hee An, Hyoung Min Park, Il Gyu Kang, Joo Hyun Jung
A 36-year-old man presented because of nasal obstruction, rhinorrhea, and postnasal drip. The patient had undergone reconstruction of a blow-out fracture of the orbital floor 12 years before and had sinusitis that likely had resulted from implant migration into the maxillary sinus. The inflammation was successfully resolved, and the implant was removed through a minimally invasive endoscopic sinus surgery technique. On pathologic examination, an organizing hematoma was identified as the cause of the lesion...
June 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28541246/correlation-between-the-extent-of-pneumatization-of-agger-agger-nasi-nasi-cells-and-the-anterior-to-posterior-length-of-the-frontal-recess-a-a-computer-assisted-anatomical-study
#20
Ahmet Altıntaş, Mustafa Çelik, Yakup Yegin, Sinan Canpolat, Burak Olgun, Fatma Tülin Kayhan
OBJECTIVES: To explore the correlation between the volume of the aAgger nNasi (AN) cell bulge and the A-P length of the frontal recess (FR). SUBJECTS AND METHODS: In total, 120 patients, who underwent septoplasty, were included. All patients underwent preoperative paranasal sinus computed tomography of the paranasal sinuses (PNS CT) imaging. In total, CT data on of all 120 PNSs patients were analyzed in terms of thewith respect to the extent of pneumatization of the AN cell bulge and the A-P dimensions of the FR...
June 30, 2017: Otolaryngologia Polska
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