Fronto-septal rostrum: prevalence, classification and clinical implications

2018 ◽  
Vol 132 (5) ◽  
pp. 423-428
Author(s):  
E Eviatar ◽  
Y Golan ◽  
H Gavriel
Keyword(s):  
Computed Tomography ◽  
Frontal Sinus ◽  
Nasal Septum ◽  
Clinical Implications ◽  
Surgical Indications ◽  
Anatomical Variant ◽  
Significant Difference ◽  
Computed Tomography Scans ◽  
Air Space ◽  
Frontal Sinuses

AbstractObjective:To describe a newly observed frontal sinus anatomical variant, the fronto-septal rostrum.Methods:Consecutive sinus computed tomography scans performed during 2013 were reviewed. The fronto-septal rostrum was defined as a mucosa-lined air space formed in the attachment of the most upper bony nasal septum and the central floor of the frontal sinuses.Results:The study included 400 computed tomography scans from 189 women (47.3 per cent) and 211 men (52.8 per cent), with a mean age of 46.8 years. A fronto-septal rostrum was observed in 122 patients (30.5 per cent), with a mean length of 10.63 mm, width of 4.52 mm, height of 2.18 mm and volume of 63.52 mm3. There was no statistically significant difference related to gender (p = 0.343), and no association between the side of the fronto-septal rostrum and age (p = 0.811) or volume (p = 0.203).Conclusion:The newly described fronto-septal rostrum has possible clinical and surgical implications. It is suggested that this aerated space is used in specific surgical indications and its presence evaluated in cases of septal infection.

scholarly journals Computed Tomography Measurement of Inferior Turbinate in Asymptomatic Adult

2017 ◽  
Vol 21 (04) ◽  
pp. 366-370 ◽  
Author(s):  
Mohammad El-Anwar ◽  
Atef Hamed ◽  
Ghada Abdulmonaem ◽  
Ismail Elnashar ◽  
Inas Elfiki
Keyword(s):  
Computed Tomography ◽  
Nasal Septum ◽  
Inferior Turbinate ◽  
Common Belief ◽  
Significant Difference ◽  
Air Space ◽  
Asymptomatic Adult ◽  
The Common ◽  
The Difference ◽  
Ct Measurement

Introduction The inferior turbinate (IT) is the most susceptible turbinate to enlargement causing nasal obstruction. The common belief ascribes most of the enlargement of the IT to mucosal elements. Objective This study aimed to investigate the detailed computed tomography (CT) measurement of the IT in asymptomatic adult by determining the thickness of both the non-bony (mucosa) and bony parts and their relation to nasal air space in different related areas of the nose. Methods We included in the study paranasal CT scans of 108 individuals (216 IT) that had no paranasal pathology. We acquired axial images with multiplanar reformates to obtain delicate details in coronal and sagittal planes for all subjects. We took separate measurements of the thickness of the medial mucosa, bones, and lateral mucosa of the IT on the anterior and posterior portions of ITs. We also measured the air space of the nasal cavity between the septum and IT anteriorly and posteriorly. Results The difference in the air space between nasal septum, anterior and posterior ends of IT was extremely statistically significant (P < 0.0001). The thickness of the medial mucosa was extremely significantly more than the lateral mucosa width (P < 0.0001). There was no significant difference in length of IT at both sides (p = 0.5781). Conclusion The detailed CT measurement of the IT in normal adult is an easy and novel measurement. This study lays the foundation for CT measurement of IT for further work that can describe changes in IT measures after turbinate surgery.

scholarly journals Aplasia and agenesis of the frontal sinus in individual of southern region in Saudi Arabia

2021 ◽  
Vol 7 (5) ◽  
pp. 821
Author(s):  
Radeif Shamakhi ◽  
Musleh Mubaraki ◽  
Ramzi Dighriri ◽  
Azza Almarir ◽  
Alaa Alyahya
Keyword(s):  
Computed Tomography ◽  
Saudi Arabia ◽  
Paranasal Sinuses ◽  
Frontal Sinus ◽  
Southern Region ◽  
Ct Scans ◽  
Anatomic Variations ◽  
Computed Tomography Scans ◽  
Preoperative Ct ◽  
Frontal Sinuses

<p class="abstract"><strong>Background:</strong> The aim of this study was to demonstrate the prevalence of anatomic variations of frontal sinus in people of southern region in Saudi Arabia.</p><p class="abstract"><strong>Methods:</strong> This study used a retrospective radiological design to analyze computed tomography scans of 117 patients aged between 18 and 80 years of southern region in Saudi Arabia were used in this study. Patients with altered anatomy (iatrogenic or pathological) were excluded, CT scans were analyzed to demonstrate the incidence of anatomic variations of frontal sinus in people of southern region in Saudi Arabia.</p><p class="abstract"><strong>Results:</strong> The study included 117 patients, 75 of whom were males (64%) and 42 of whom were females (36%) with ages ranging from 18 to 80 years. The prevalence of bilateral frontal sinus aplasia is 5.9 % and 3.4% is in the unilateral frontal sinus.</p><p class="abstract"><strong>Conclusions:</strong> These figures on frontal sinus aplasia are critical in convincing surgeons to perform a preoperative CT scan of the paranasal sinuses and concentrate on the appearance of frontal sinuses on CT images to avoid unwanted complications during sinus surgeries.</p><p class="abstract"> </p>

A volumetric three-dimensional evaluation of invasiveness of an endoscopic and microscopic approach for transmeatal visualisation of the middle ear

2021 ◽  
pp. 1-5
Author(s):  
A H A Baazil ◽  
J G G Dobbe ◽  
E van Spronsen ◽  
F A Ebbens ◽  
F G Dikkers ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Middle Ear ◽  
Three Dimensional ◽  
Endoscopic Approach ◽  
Microscopic Approach ◽  
Significant Difference ◽  
Computed Tomography Scans ◽  
The Difference ◽  
Group 2 ◽  
Group 1

Abstract Objective This study aimed to compare the necessary scutum defect for transmeatal visualisation of middle-ear landmarks between an endoscopic and microscopic approach. Method Human cadaveric heads were used. In group 1, middle-ear landmarks were visualised by endoscope (group 1 endoscopic approach) and subsequently by microscope (group 1 microscopic approach following endoscopy). In group 2, landmarks were visualised solely microscopically (group 2 microscopic approach). The amount of resected bone was evaluated via computed tomography scans. Results In the group 1 endoscopic approach, a median of 6.84 mm3 bone was resected. No statistically significant difference (Mann–Whitney U test, p = 0.163, U = 49.000) was found between the group 1 microscopic approach following endoscopy (median 17.84 mm3) and the group 2 microscopic approach (median 20.08 mm3), so these were combined. The difference between the group 1 endoscopic approach and the group 1 microscopic approach following endoscopy plus group 2 microscopic approach (median 18.16 mm3) was statistically significant (Mann–Whitney U test, p < 0.001, U = 18.000). Conclusion This study showed that endoscopic transmeatal visualisation of middle-ear landmarks preserves more of the bony scutum than a microscopic transmeatal approach.

Radiological observations on the olfactory fossa and ethmoid roof

2010 ◽  
Vol 124 (12) ◽  
pp. 1251-1256 ◽  
Author(s):  
S Elwany ◽  
A Medanni ◽  
M Eid ◽  
A Aly ◽  
A El-Daly ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Multislice Computed Tomography ◽  
Cribriform Plate ◽  
Type I ◽  
Adult Males ◽  
Significant Difference ◽  
Computed Tomography Scans ◽  
Operative Evaluation ◽  
Males And Females ◽  
The Right

AbstractObjective:To establish normative dimensions for the depth of the olfactory fossa, the length and angulation of the lateral lamella of the cribriform plate, and the height of the ethmoid roof, in adult males and females.Design:The study assessed 300 high resolution, multislice computed tomography scans of the paranasal sinuses, which were evaluated using Merge Efilm software (version 2.0.0, build 37).Results:According to the original Keros classification, the type II olfactory fossa was the commonest type in men (66.7 per cent), while the type I fossa was commonest in women (53 per cent). A difference of 3 mm or more between the depths of the right and left olfactory fossae was present in 11 per cent of men and 2 per cent of women. The lateral lamella of the cribriform plate was significantly shorter and less oblique in men than in women. The length of the lateral lamella was greater anteriorly than posteriorly in both sexes. There was a statistically significant difference between the angle of the lateral lamellae, comparing right and left sides. The ethmoid roof was lower in women than men.Conclusion:The observed differences between men and women and between the right and left sides are of surgical importance, and should alert surgeons to the need for thorough, systematic pre-operative evaluation of computed tomography scans.

scholarly journals Comparison of Imaging Softwares for Upper Airway Evaluation: Preliminary Study

2018 ◽  
Vol 11 (4) ◽  
pp. 273-277
Author(s):  
Guilherme dos Santos Trento ◽  
Lucas Borin Moura ◽  
Rubens Spin-Neto ◽  
Philipp Christian Jürgens ◽  
Marisa Aparecida Cabrini Gabrielli ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Digital Imaging ◽  
Upper Airway ◽  
Cone Beam ◽  
Maxillary Expansion ◽  
Accuracy And Precision ◽  
Significant Difference ◽  
Computed Tomography Scans ◽  
The Mean ◽  
Preliminary Study

The interest about upper airway evaluation has increased lately. Therefore, many softwares have been developed aiming to improve and facilitate the analysis of airway volume. The objective of this study was to compare two different softwares packages, Mimics and Dolphin, in their accuracy and precision in upper airway space measurements. Preoperative cone beam computed tomography scans of nine nonsyndromic patients submitted to surgically assisted rapid maxillary expansion were included in this study. The imaging exams were converted to DICOM (digital imaging and communications in medicine) files and imported to the softwares. The mean volume for the Dolphin group (G1) was 10.791 cm3 (SD = 4.269 cm3) and for the Mimics group (G2) was 10.553 cm3 (SD = 4.564 cm3). There was no statistically significant difference between the two groups ( p = 0.105).

The Horizon Sign and Frontal Bar: Two Topographic Landmarks to Confirm Endoscopic Frontal Sinusotomy

2019 ◽  
Vol 160 (4) ◽  
pp. 740-743
Author(s):  
Evan S. Walgama ◽  
Andrew Thamboo ◽  
Navarat Tangbumrungtham ◽  
Noel Ayoub ◽  
Zara M. Patel ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Endoscopic Sinus Surgery ◽  
Frontal Sinus ◽  
Case Series ◽  
Acute Angle ◽  
Sinus Surgery ◽  
Consecutive Case ◽  
Landmark Identification ◽  
Frontal Sinuses ◽  
Anterior Posterior

Confirming a thorough dissection of the frontal sinus during endoscopic sinus surgery can be challenging, and some surgeons would benefit from reliable topographic landmark identification to ensure completion of this sinus dissection. We defined (1) the “horizon sign” as the curvilinear shadow of the posterior table cast superiorly upon the anterior table of the frontal sinus at the acute angle of their meeting point and (2) the “frontal bar” as a sagittal septation at the union of the anterior/posterior tables. A cadaveric study, followed by an intraoperative consecutive case series, was performed to evaluate these 2 landmarks as indicators of complete dissection. The horizon sign was extremely reliable, identified in 100% of cadaveric frontal sinuses and intraoperative frontal sinuses. The frontal bar was present in only 67% of frontal sinuses by computed tomography. In live patients, the sensitivity and specificity of the frontal bar were 62% and 95%, respectively.

scholarly journals Mandibular Canal Location and Cortical Bone Thickness in Males and Females of Different Age Groups: A Cone-beam Computed Tomography Study

2021 ◽  
Vol 9 (A) ◽  
pp. 1117-1122
Author(s):  
Sherif Shafik El-Bahnasy ◽  
Magdy Youakim ◽  
Mohamed Shamel ◽  
Hisham El Sheikh
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Age Groups ◽  
Mandibular Canal ◽  
Cone Beam ◽  
Age Group ◽  
Bone Thickness ◽  
Significant Difference ◽  
Computed Tomography Scans ◽  
The Mean

AIM: The purpose of the study was to measure and compare the prevalence of mandibular canal (MC) location variations in regard to mandibular first molars in both genders at different age groups. METHODS: A retrospective study was performed on 80 cone-beam computed tomography scans. Distance between MC and apical apices of first molars, buccal and lingual cortical plates was measured in both sides. RESULTS: 80 scans with 160 sides were analyzed. Distances was measured bilaterally for all scans with mean (5.22 ± 0.77) in men versus (4.1 ± 0.7) in women at group age 31–40 apical to apices of first molars. The mean was (3.77 ± 0.62) in men versus (2.81 ± 0.47) in women at same age group at buccal side, lingually the mean was (4.02 ± 0.67) in men versus (3.67 ± 0.26) in women in the same age group. CONCLUSION: Our study showed that there were decrease in measurements in older age group in both genders and in female groups more than male groups but with no statistical significant difference.

Variations in Mortise Anatomy

2005 ◽  
Vol 33 (6) ◽  
pp. 852-855 ◽  
Author(s):  
Christopher T. LeBrun ◽  
John O. Krause
Keyword(s):  
Computed Tomography ◽  
Ankle Instability ◽  
Articular Surface ◽  
New Method ◽  
Medial Malleolus ◽  
Level Of Evidence ◽  
Predisposing Factor ◽  
Index Method ◽  
Significant Difference ◽  
Computed Tomography Scans

Background Variations in ankle mortise anatomy may be a predisposing factor to ankle instability. Hypothesis A posteriorly positioned fibula associated with ankle instability may not be a true pathologic entity but rather the result of measuring off an internally rotated talus. Study Design Cohort study (diagnosis); Level of evidence, 2. Methods The authors reviewed 60 ankle computed tomography scans performed on patients from their institution for reasons unrelated to ankle instability. They also reviewed ankle computed tomography scans on 21 patients surgically treated for clinical ankle instability. The position of the fibula in relation to the talar articular surface was calculated and expressed as the axial malleolar index, as described by Scranton et al. They also calculated the intermalleolar index, a new method that references the medial malleolus, not the talus. Results Using the method of Scranton et al, the axial malleolar index in the control and instability patients was similar to values previously described, and there was a significant difference between control and instability patients (P <. 01). However, using the intermalleolar index method referencing the medial malleolus, there was not a significant difference between control and instability patients (P =. 43). Conclusion The new method of referencing the medial malleolus assesses fibular position independent of talar rotation. The data, when referencing the medial malleolus, do not show significant variation in fibular position in patients with and without ankle instability.

Septopalatal Protraction for Correction of Nasal Septal Deformity in Cleft Palate Infants

2005 ◽  
Vol 133 (6) ◽  
pp. 949-953 ◽  
Author(s):  
Corey C. Moore ◽  
Ian MacDonald ◽  
Ralph Latham ◽  
Michael G. Brandt
Keyword(s):  
Computed Tomography ◽  
Cleft Palate ◽  
Nasal Septum ◽  
Airflow Obstruction ◽  
Septal Deviation ◽  
Nasal Airflow ◽  
Nasal Septal Deviation ◽  
Paired Student ◽  
Angle Deviation ◽  
Computed Tomography Scans

OBJECTIVE: It is proposed to test the practicality of septopalatal protraction in the unilateral cleft palate infant for purposes of straightening the nasal septum and thus relieving nasal airflow obstruction and its detrimental sequelae. METHODS: Alternate infants affected with complete unilateral palatal clefts had septopalatal protraction for a period of 6 to 8 weeks (protraction group; n = 4). Septal deviation was measured by a standardized technique that used computed tomography scans. The remaining infants had no protraction and served as controls (nonprotraction group; n = 5). Septal deviation was measured in the nonprotraction group from palatoseptal dental molds. RESULTS: A total of 9 patients were studied. All patients in the nonprotraction group had worsening of nasal septal deviation over a period of 8 weeks compared with the protraction group, which had complete nasal septal straightening. Differences in septal angle deviation between the protraction group and nonprotraction group at the end of the study were statistically significant ( P ≤ 0.01) as measured by the paired Student t test. CONCLUSIONS: Septopalatal protraction in the newborn appears to provide a means for correcting nasal septal deviation in complete unilateral cleft palate infants. Septopalatal protraction in the newborn is relatively easy and safe. EBM RATING: B-2

Sign in / Sign up

Export Citation Format

Share Document