scholarly journals Frequency of Anatomical Variants of Paranasal Sinuses (PNS) on Computed Tomography (CT)

2021 ◽  
Vol 15 (6) ◽  
pp. 1443-1445
Author(s):  
M. A. Siddiqui ◽  
M. Amin ◽  
A. Firdous ◽  
H. A. Saqib ◽  
S. Nighat ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Nasal Cavity ◽  
Standard Procedure ◽  
Lateral Wall ◽  
Anatomical Variations ◽  
Ct Scanner ◽  
Nasal Sinus ◽  
Anatomical Variants ◽  
Surgical Evaluation ◽  
Dual Source

Background: The para nasal sinuses be collection of air filled spaces adjoining the nasal cavity. Para nasal sinuses build up as of the primitive choana at 25–28 weeks of gestation. Three projections ascend from the lateral wall of the nose and work as the commencement of the growth of the para nasal sinuses. The Frequency of Anatomical Variants of Para nasal Sinuses (PNS) may be illustrated on Computed Tomography (CT) by using double slice CT machine. Aim: To reveal the anatomy of the para nasal sinuses as shown on the CT along with point out the variants lead to chronic sinusitis and escort obstacles in sino nasal operations. Methodology: This study was conducted in Ibnae-e Sieena Hospital and MMDC Multan during September 2019 to December 2019. In 50 patients without para nasal sinus diseases symptoms, head computed tomography studies were carried out after having consent from them and IRB. Para nasal sinuses coronal sections were taken. The CT studies were performed by using Dual Source multi slice CT Scanner. Results: 50 participants included in the study, 25 men with 25 women. Out of them, 22 having anatomical variants were noticed. Most common anatomical variants found were pneumatisation of center nasal turbinates (30%) then agger nasi cells 25%, Haller’s cells 20%, along with septal deviation 13% and sphenoid sinus septation (12%). Conclusion: This study shows that nasal cavity and para nasal sinuses anatomical variations are common. For the radiologic analysis of the para nasal sinuses, as of diagnosis of the pre and post -surgical evaluation and sino-nasal lesions, CT is the gold standard procedure. It can outline and explain the anatomical variants in para nasal sinuses. CT not only detect the lesion to vital constitutions which lined the para nasal sinuses but also repeated lesions that extra mural cells. CT of the para nasal sinuses has vital importance and should be passably analyze before FESS. Keywords: Para nasal sinuses, Computed tomography, Nasal turbinate, Ostiomeatal complex

scholarly journals STUDY OF NORMAL ANATOMICAL VARIATIONS IN PARA-NASAL SINUSES USING COMPUTED TOMOGRAPHY SCAN: A CROSS SECTIONAL STUDY FROM CENTRAL INDIA

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Sunil Patil ◽  
Shweta Shendey ◽  
Ibrahim Ansari
Keyword(s):  
Computed Tomography ◽  
Endoscopic Sinus Surgery ◽  
Anatomical Variations ◽  
Functional Endoscopic Sinus Surgery ◽  
Septal Deviation ◽  
Sinus Surgery ◽  
Radiology Department ◽  
Nasal Sinus ◽  
Wide Range ◽  
Computed Tomography Scanning

Background: The standard imaging in the assessment of the para-nasal sinuses is currently computed tomography scanning. This provides an applied anatomical view of the area as well as the common anatomical variants. The advancement and improvement of computed tomography scans has provided for a comprehensive evaluation of patients' para-nasal sinuses, allowing Functional Endoscopic Sinus Surgery surgeons to operate with a guide chart. Objectives: To study normal anatomical variations in para-nasal sinuses using Computed Tomography. Material and Methods: This research took place in a tertiary healthcare center's radiology department over the course of two years. Axial para-nasal sinuses cuts were taken using a multi-slice (128 slice scanner), followed by coronal and sagittal reconstruction. Results: The most common anatomic variation, according to the findings, was nasal septal deviation. The rarest variation in our sample was Haller cell and pneumatized septum. There was also a close connection between unilateral Concha bullosa and contra-lateral septal deviation, as evidenced by the research. Conclusion: A wide range of lesions can affect the para-nasal sinus area. Normal anatomical differences and congenital abnormalities in this area are significant because they can have pathological consequences or cause difficulty/complication during surgery. Keywords: Para-nasal sinuses, Computed Tomography, Functional Endoscopic Sinus Surgery.

Cochlear Implant Surgery Through Round Window Approach Is Always Possible

2019 ◽  
Vol 128 (6_suppl) ◽  
pp. 38S-44S ◽  
Author(s):  
Seong-Cheon Bae ◽  
You-Ree Shin ◽  
Young-Myoung Chun
Keyword(s):  
Cochlear Implant ◽  
Standard Procedure ◽  
Round Window ◽  
Lateral Wall ◽  
Anatomical Variations ◽  
Implant Surgery ◽  
Cochlear Implant Surgery ◽  
Alternative Procedures ◽  
Electrode Insertion ◽  
Window Approach

Objectives: The benefit of round window (RW) approach for cochlear implant (CI) has been well studied. Because the RW represents a natural door to scala tympani, it facilitates precise electrode insertion. Atraumatic electrode insertion can also be performed without drilling the cochlear lateral wall. However, the RW approach has several limitations. The purpose of this study is to describe successful CI surgeries utilizing the RW approach except for severe cases of temporal bone anomaly. The authors’ successful surgical solution for cases involving difficult RW access is also described. Materials and Methods: We retrospectively analyzed 377 consecutive surgeries of cochlear implantation performed between June 2010 and December 2018 by a single experienced surgeon. Standard and alternative procedures were used according to anatomical variations. Standard procedures included modified techniques of mastoidectomy in the RW approach, opening of facial recess, exposure of RW membrane, and electrode insertion. Difficult cases involving severe rotated cochlea or hypoplastic mastoid were successfully treated with RW insertion using alternative procedures such as external auditory canal (EAC) wall mobilization and endomeatal approach. Results: We performed CI surgery through a reproducible RW technique in two cases involving endomeatal approach and three cases of EAC mobilization. Other cases were treated using the standard procedure. Conclusion: Cochlear implant surgery through RW is reliable, safe, and effective. The RW technique is reproducible via several surgical procedures in most CI cases. Identification and safe exposure of RW membrane is a prerequisite for successful electrode insertion in cochlear implant surgery.

Comparison of ultra-low dose chest CT scanning protocols for the detection of pulmonary nodules: a phantom study

2019 ◽  
Vol 105 (5) ◽  
pp. 394-403 ◽  
Author(s):  
Gianluca Milanese ◽  
Mario Silva ◽  
Thomas Frauenfelder ◽  
Matthias Eberhard ◽  
Federica Sabia ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Low Dose ◽  
Pulmonary Nodules ◽  
Lung Cancer Screening ◽  
Ct Scanning ◽  
Tube Current Modulation ◽  
Ct Scanner ◽  
Current Modulation ◽  
Tube Current ◽  
Dual Source

Purpose:To test ultra-low-dose computed tomography (ULDCT) scanning protocols for the detection of pulmonary nodules (PN).Methods:A chest phantom containing 19 solid and 11 subsolid PNs was scanned on a third-generation dual-source computed tomography (CT) scanner. Five ULDCT scans (Sn100kVp and 120, 70, 50, 30, and 20 reference mAs, using tube current modulation), reconstructed with iterative reconstruction (IR) algorithm at strength levels 2, 3, 4, and 5, were compared with standard CT (120kVp, 150 reference mAs, using tube current modulation). PNs were subjectively assessed according to a 4-point scale: 0, nondetectable nodule; 1, detectable nodule, very unlikely to be correctly measured; 2, detectable nodule, likely to be correctly measured; 3, PN quality equal to standard of reference. PN scores were analysed according to the Lung Imaging Reporting and Data System (Lung-RADS), simulating detection of nodules at baseline and incidence screening round.Results:For the baseline round, there were 17 Lung-RADS 2, 4 Lung-RADS 3, 8 Lung-RADS 4A, and 1 Lung-RADS 4B PNs. They were detectable in any ULDCT protocol, with the exception of 1 nondetectable part-solid nodule in 1 scanning protocol (120 reference mAs; IR strength: 3). For the incidence round, there were 4 Lung-RADS 2, 14 Lung-RADS 3, 2 Lung-RADS 4A, and 10 Lung-RADS 4B PNs. Ten were nondetectable in at least one ULDCT dataset; however, they were at least detectable in ULDCT with 70 reference mAs (IR strength: 4 and 5).Conclusions:ULDCT scanning protocols allowing the detection of PNs can be proposed for the purpose of lung cancer screening.

scholarly journals An Unusual Location of Juvenile Angiofibroma: A Case Report and Review of the Literature

2013 ◽  
Vol 2013 ◽  
pp. 1-3 ◽  
Author(s):  
Ravishankar Pillenahalli Maheshwarappa ◽  
Amit Gupta ◽  
Juhi Bansal ◽  
Mahesh Virupaksha Kattimani ◽  
Sachin Shivayogappa Shabadi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Case Report ◽  
Nasal Cavity ◽  
Inferior Turbinate ◽  
Lateral Wall ◽  
Polypoid Mass ◽  
Review Of The Literature ◽  
Left Nasal Cavity ◽  
Endoscopic Evaluation ◽  
Juvenile Angiofibroma

A 10-year-old boy presented with left-sided nasal obstruction and epistaxis. Endoscopic evaluation revealed a polypoid mass in the vestibule arising from the lateral wall of the nasal cavity anteroinferior to the left inferior turbinate. Computed tomography (CT) scan showed a soft tissue opacity in the vestibule of the left nasal cavity. After the endoscopic excision of the mass, postoperative and histopathological analyses confirmed the diagnosis of an angiofibroma.

scholarly journals A computed tomography and endoscopy assisted study of the anatomical variations of lateral wall of nose in patients of chronic rhinosinusitis- our experience at a tertiary care centre

2017 ◽  
Vol 3 (2) ◽  
pp. 327
Author(s):  
Shashidhar S. Suligavi ◽  
Afshan Fathima ◽  
Mallikarjun N. Patil ◽  
S. S. Doddamani
Keyword(s):  
Computed Tomography ◽  
Ct Scan ◽  
Chronic Rhinosinusitis ◽  
Task Force ◽  
Anatomic Variation ◽  
Intraoperative Complications ◽  
Tertiary Care ◽  
Middle Turbinate ◽  
Lateral Wall ◽  
Anatomical Variations

<p class="abstract"><strong>Background:</strong> <span lang="EN-IN">Chronic rhinosinusitis (CRS) is a common and persistent illness that ENT surgeons encounter in their day to day practice. The lateral wall of the nose contains the ostiomeatal unit which is the key area targeted in the management of CRS. The lateral wall of nose shows several variations which can alter the course of the disease. It is of utmost importance for the ENT surgeon to be aware of these variations as they decide the overall line of management. The objectives of the study was to study the anatomical variations of the lateral wall of nose using computed tomography (CT) scans and nasal endoscopy in patients of chronic rhinosinusitis.</span></p><p class="abstract"><strong>Methods:</strong> <span lang="EN-IN">A one year study from April 2015 to March 2016 involving 50 patients attending the ENT outpatient department clinically diagnosed as CRS using the criteria of task force on rhinosinusitis were included in the present study. Patients underwent a CT scan and DNE and the anatomical variations of the lateral wall of nose were studied.  </span></p><p class="abstract"><strong>Results:</strong> <span lang="EN-IN">Concha bullosa was the most common anatomic variation noted in 20 (40%) of the total 50 patients. The other anatomic variations noted were uncinate process variations in 15(30%) patients, agger nasi cells in 3 (6%) patients, hypoplastic middle turbinate in 1 (2%) patient, paradoxical middle turbinate in 2(4%) patients, bulla ethmoidalis in 4 (8%) patients and Haller cells in 1 (2%) patient. </span></p><p class="abstract"><strong>Conclusions:</strong> <span lang="EN-IN">The lateral wall of nose is made up of several structures showing variations which can lead to the development CRS and affect the overall management. They should be evaluated pre-operatively in order to avoid intraoperative complications. CT scan and DNE both complement each other and effectively evaluate the anatomical variations of the lateral wall of nose.</span></p>

scholarly journals Clinically Significant Variation of Paranasal Sinuses on CT-Scan

2021 ◽  
Vol 10 (02) ◽  
pp. 152-157
Author(s):  
Maryam Faiz Qureshi ◽  
Ambreen Usmani
Keyword(s):  
Ct Scan ◽  
Nasal Cavity ◽  
Paranasal Sinuses ◽  
Structural Changes ◽  
Anatomical Variations ◽  
Causative Factor ◽  
Anatomical Variants ◽  
Important Diagnostic Tool ◽  
History Of ◽  
Clinically Significant

Anatomical variations are not diseases and can be found in every individual. Due to the anatomical variations, the structural changes occur in nearby anatomical relations. By keeping in mind, the vast range of anatomical variations in nasal cavity and paranasal sinuses (PNS), every case of sinusitis must be planned carefully to avoid dreadful complications of surgical procedures. Sinus anatomical variations have been associated with the etiology of sinusitis. In this regard computed tomography (CT) imaging has become an important diagnostic tool. CT Scan imaging of nose and para nasal sinuses is mandatory in patients with history of sinusitis in order to evaluate the detailed anatomy which includes normal anatomy, anatomical variations, bony details and the extent of the disease pathology. Certain anatomical variants are supposed to be a causative factor for development of sinus pathology and hence it becomes compulsory for the radiologist to be aware of the anatomical variants of nasal cavity and PNS especially if the subject is considered for surgical intervention.

Sign in / Sign up

Export Citation Format

Share Document