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Nasal Dermoid Cyst with Sinus Tract Intranasal Bone: A Case Report

International Journal of Otolaryngology and Head & Neck Surgery 2024年第2期13卷 149-156页

作者： Sultan Kadasah Abdullah alhelali Saud aldhabaan Abdulaziz al Qahtani Abdullah Musleh ali alshahrani Shahd Dlboh sahar al-otaibi Department of Surgery College of Medicine University of Bisha Bisha Saudi Arabia Department of Otolaryngology Head and Neck Surgery Abha Children’s Hospital Abha Saudi Arabia Department of Otolaryngology Head and Neck Surgery Armed Forces Southern Region Hospital Khamis Mushait Saudi Arabia Department of Surgery College of Medicine King Khalid University Abha Saudi Arabia College of Medicine King Khalid University Abha Saudi Arabia

Dermoid cysts are benign tumors originating from germ cells, which can form in various locations, including the nasal area in rare cases. They are of unknown exact etiology, but it is suggested that it is due to abnormal tissue migration during early embryonic development. Nasal dermoid cysts albeit rare, can present in various forms such as sinuses, fistulas, or intracranially extending tracts. They can be asymptomatic and incidentally discovered or present with a visible external mass or sinus that is either painful, infected or cosmetically concerning. If nasal dermoid cysts with an intra-nasal bone sinus tract are left untreated, they can lead to life-threatening complications. This report describes the case of a 6-year-old girl with a nasal dermoid cyst connected to a superficial punctum by an intra-nasal tract. She had undergone surgical excision of a nasal swelling previously diagnosed as a dermoid cyst. One year later, she returned to our clinic with a recurrence of the nasal swelling. Imaging tests revealed a nasal dermoid cyst with a tract extending to the nasal tip, without intracranial expansion. The cyst, along with the entire tract, was successfully removed surgically, and the postoperative follow-up indicated no complications. Histopathology confirmed the diagnosis of a dermoid cyst. This case underscores the significance of considering the dermoid tract in nasal cyst cases and the necessity of its complete removal to prevent recurrence.

关键词： Dermoid Cyst Nasal Sinus Sinus Tract Intranasal Bone Benign Tumor Congenital Anomaly

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Unilateral Choanal Atresia in Adults: A Case Series

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International Journal of Otolaryngology and Head & Neck Surgery 2024年第3期13卷 187-193页

作者： Sultan Kadasah Abdulaziz al Qahtani Ghalib al-Sayed Abdullah al Helali Saud aldhabaan Abdullah Musleh ali Asiry Mohammed Asiri Shahd Dlboh Adnan al-Malki Abdulsalam alqhtani Mohammed al-khulban sahar al-otaibi Department of Surgery College of Medicine University of Bisha Bisha Saudi Arabia Department of Otolaryngology Head and Neck Surgery Armed Forces Southern Region Hospital Khamis Mushait Saudi Arabia Department of Otolaryngology Head and Neck Surgery Abha Children&#8217s Hospital Abha Saudi Arabia Department of Surgery College of Medicine King Khalid University Abha Saudi Arabia Department of Otolaryngology Head and Neck Surgery Aseer Central Hospital Abha Saudi Arabia College of Medicine King Khalid University Abha Saudi Arabia

Choanal atresia (CA) is a rare occlusion of the posterior choanae. Unilateral cases have been reported more than bilaterally, and it’s more often right-sided in those patients. According to the literature, mixed bony-membranous atresia is the most common type. There is a high incidence of craniofacial and visceral anomalies associated with congenital choanal atresia. Therefore, investigation for associated congenital anomalies is an important step before the surgery. We report 2 cases of incidental finding of unilateral choanal atresia in a 21- and 17-year-old with nasal discharge being the only complaint in the former and nasal obstruction with headache in the latter. The patients were then scheduled for day-surgery as a case of choanal atresia for transnasal, endoscopic repair and posterior septectomy. The patients were discharged home on the same day with the absence of restenosis or other complications.

关键词： Choanal Atresia Nasal Obstruction Congenital Anomaly

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Optimum alternate material selection methodology for an aircraft skin

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Chinese Journal of Aeronautics 2023年第7期36卷 476-488页

作者： Fareed AHMAD Mohammed al AWADH sahar NOOR Industrial Engineering Department University of Engineering and TechnologyPeshawar 25000Pakistan Department of Industrial Engineering College of EngineeringKing Khalid UniversityAbha 62529Saudi Arabia

Weight penalty has been a challenge for design engineers of aerospace ***’s high-efficiency combat aircraft undergoes intense stress and strain during flying missions,which require stronger and stiffer materials to retain structural *** metallic materials have been successfully used for the construction of aircraft structures and components,metals still have a low strength-to-weight *** paper aims to develop an alternate optimised material selection methodology to replace the metallic skin of a medium-sized military *** search for the optimum material will result in reduced aircraft weight which will be benefitted by extra payload on the *** selection methodology is comprised of finding design pressure limits on the aircraft skin,and comparison of properties(strength,elastic modulus,shear modulus,etc.)and performance(safety factor,deflection,and stress)of the existing metallic skin with alternate optimised *** comparison was made under aerodynamic pressure,bending force,and twisting *** Fibre Reinforced Polymer/Epoxy(CFRP)Uni-Directional(UD)prepreg(elastic modolus is 209 GPa)was selected as an alternate optimum material to replace the aluminium alloy skin of the aircraft *** selected alternate optimum material resulted in the reduction of aircraft skin weight by 30%.

关键词： Aircraft skin Carbon Fibre Reinforced Plastic(CFRP) Material index Material selection methodology Optimum material

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Significant association of a single nucleotide polymorphism in the upstream region of FGFR1OP2/wit3.0 gene with residual ridge resorption of mandible in Saudis

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BIOCELL 2020年第1期44卷 55-62页

作者： sahar alZAIN Hana al SHEIKH Arwa al THOMalI Fatimah al-MUKAYNIZI Noha alMOBEREK sahar A.alMalKI Narasimha Reddy PARINE Arjumand WARSY Department of Prosthetic Dental Sciences College of DentistryKing Saud UniversityRiyadhSaudi Arabia Central Laboratory&Prince Naif Health Research Center Center for Science and Medical Studies for GirlsKing Saud UniversityRiyadhSaudi Arabia Genome Research Chair Department of BiochemistryCollege of ScienceKing Saud UniversityRiyadhSaudi Arabia

Residual ridge resorption(RRR)is the decrease in the jaw structure that follows tooth *** is a multifactorial disorder,but reports on the associated genetic factors are scarce,particularly amongst the *** study aimed to investigate the role of single nucleotide polymorphisms(SNPs)in fibroblast growth factor receptor 1 oncogene partner 2(FGFR1OP2)in RRR development in *** study included 192 individuals(RRR=96;controls=96)attending outpatient clinics at the College of Dentistry,King Saud *** and clinical data were collected,the digital panoramic dental radiograph was obtained,and mandibular residual ridge height was *** was extracted from saliva and genotyping was conducted on“Sequenom MassARRAY iPLEX”.Genotype and allele frequencies of three SNPs were calculated and *** age at first diagnosis and bone height were compared in the three genotypes of each *** age of the patients,age at first edentulism,and bone height ranged 21-80 years,12-70 years,and 13-34.6 mm,*** three genotypes of the studied SNPs(rs2279351,rs78054962 and rs2306852)were *** rs2279351 associated significantly with RRR,and the mutant C allele was highly *** association was observed for the other two *** genotypes of all SNPs had an influence on age at first edentulism and bone height,but the results were not statistically *** FGFR1OP2 plays a role in the process of rapid wound healing in the oral cavity,it may be playing a role in the development of RRR by influencing the rate of resorption of the *** rs2279351 may alter its expression and hence RRR *** study is limited due to small a sample size,and further large-scale studies are required to confirm this association and to consider rs2279351 as a possible marker of RRR development.

关键词： Bone resorption FGFR1OP2/wit3.0 gene Residual ridge resorption Single nucleotide polymorphisms

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A significant improvement in adsorption behavior of mesoporous TUD-1 silica through neodymium incorporation

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Journal of Rare Earths 2021年第4期39卷 469-476页

作者： Badria M.al-Shehri sahar K.Mohamed Shaykha alzahly Mohamed S.Hamdy Catalysis Research Group(CRG) Department of ChemistryCollage of ScienceKing Khalid UniversityP.O.Box 2009Abha61413Saudi Arabia Chemistry Department Collage of ScienceUmm Al-Qura UniversityMakkah21421Saudi Arabia Chemistry Department Faculty of ScienceHelwan UniversityAin HelwanCairo11795Egypt King Abdullah Institute for Nanotechnology King Saud UniversityRiyadh11451Saudi Arabia

Neodymium was incorporated into the three-dimensional mesoporous siliceous material *** order to understand the chemical and morphological structure of the prepared material,several characterization techniques were *** characterization results show the formation of highly distributed isolated Nd3+ions incorporated in the silica matrix in tetrahedrally coordinated structure,moreover no aggregation of separate phase(s)was/were *** prepared material was investigated as an adsorbent for methyl green(MG)dye in aqueous solution as a model cationic *** results show higher adsorption capacity for Nd-TUD-1 by almost 24 times higher than the neat parent TUD-1 material and more than 100 times higher than bulky Nd_(2)O_(3)under neutral *** adsorption results were fitted perfectly with pseudo-second-order ***,the adsorption isotherms were perfectly fitted with Freundlich isotherm model which indicates the formation of a multilayer of the dye molecules onto the Nd-TUD-1 surface as a physisorption with endothermic nature.

关键词： Adsorption Neodymium TUD-1 Mesoporous silica Water treatment Kinetics

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Spin transfer torque in the semiconductor/ferromagnetic structure in the presence of Rashba effect

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Chinese Physics B 2017年第2期26卷 505-511页

作者： Javad Vahedi sahar Ghasab Satoory Department of Physics lslamic Azad University Sari Branch Sari Ira

Spin transfer torque in magnetic structure occurs when the transverse component of the spin current that flows from the nonmagnetic medium to ferromagnetic medium is absorbed by the interface. In this paper, considering the Rashba effect on the semiconductor region, we discuss the spin transfer torque in semiconductor/ferromagnetic structure and obtain the components of spin-current density for two models：（i） single electron and（ii） the distribution of electrons. We show that no matter whether the difference in Fermi surface between semiconductor and Fermi spheres for the up and down spins in ferromagnetic increases, the transmission probability decreases. The obtained results for the values used in this article illustrate that Rashba effect increases the difference in Fermi sphere between semiconductor and Fermi sphere for the up and down spins in ferromagnetic. The results also show that the Rashba effect, brings an additional contribution to the components of spin transfer torque, which does not exist in the absence of the Rashba interaction. Moreover, the Rashba term has also different effects on the transverse components of the spin torque transfer.

关键词： spin transfer torque Rashba interaction ferromagnetic

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Knowledge, attitude and practice of breast self examination and breast cancer among female medical students in Taif, Saudi Arabia

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Open Journal of Preventive Medicine 2014年第2期4卷 69-77页

作者： Dalal M. Nemenqani sahar H. Abdelmaqsoud al-Hanouf A. al-Malki Abrar A. Oraija Eiman M. al-otaibi College of Medicine Taif University Taif KSA College of Medicine Taif University Taif KSA Preventive Affairs Department Alexandria University Students’ Clinic and Hospital Alexandria Egypt

Introduction and Research Problem: Breast cancer is the most common of all female cancers in Kingdom of Saudi Arabia. Different studies conducted in the Kingdom have shown that knowledge of females regarding breast cancer is poor. Aim of the study was to determine knowledge, attitude and practice among students of Saudi female medical university towards Breast Self Examination (BSE) and also to explore their knowledge about breast cancer. Research Methodology: An observational cross-sectional study was conducted at Faculty of Medicine, Taif University during October 2013. Sample size was 378 with mean age of 19.9 ± 1.5. A self administrated questionnaire was used to obtain data about knowledge, attitude and practice towards BSE and knowledge about breast cancer. Data were collected and fed to SPSS version 16. Shape of distribution for numerical data was tested by using one sample Kolmogorov-Smirnov test. Chi-Square Test & Fissure Exact Test (FET) were used for testing relation between categorical variables while correlation analysis was used to test the strength of relation between numeric variables. Main Results: The study revealed that only 8.2% of participants had good overall knowledge about breast cancer and BSE. although 66% of the study sample had positive attitude towards BSE, only 17% reported that they practiced BSE monthly. A significant positive moderate correlation was found between overall knowledge score and attitude towards BSE (r = 0.449 & p = 0.000). The same was for the frequency of BSE practice but it was found to be in a weak magnitude (r = 0.223 & p = 0.000). Conclusion and Recommendations: although there was lack of knowledge about breast cancer and BSE yet, positive attitude towards BSE was encouraging. Most female medical students in our sample did not perform BSE or perform it irregularly. Therefore, more intensified awareness programs among students of medical university are necessary to keep in view their current status of breast cancer a

关键词： Breast Self Examination Breast Cancer Medical Students Saudi Arabia

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Improving the seismic torsional behavior of plan-asymmetric,single-storey,concrete moment resisting buildings with fluid viscous dampers

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Earthquake Engineering and Engineering Vibration 2016年第1期15卷 61-78页

作者： Fayaz Rahimzadeh Rofooei sahar Mohammadzadeh Civil Engineering Department Sharif University of Technology

The optimal distribution of fluid viscous dampers（FVD）in controlling the seismic response of eccentric,single-storey,moment resisting concrete structures is investigated using the previously defined center of damping constant（CDC）.For this purpose,a number of structural models with different one-way stiffness and strength eccentricities are *** nonlinear time history analyses are carried out for various arrangements of *** is shown that the arrangement of FVDs for controlling the torsional behavior due to asymmetry in the concrete structures is very dependent on the intensity of the peak ground acceleration（PGA）and the extent of the structural stiffness and strength *** results indicate that,in the linear range of structural behavior the stiffness eccentricity es which is the main parameter in determining the location of optimal CDC,is found to be less or smaller than the optimal damping constant eccentricity e＊d,i.e.,｜e＊d｜〉｜es｜.But,in the nonlinear range of structural behavior where the strength eccentricity er is the dominant factor in determining the location of optimal CDC,｜e＊d｜〉｜er｜.It is also concluded that for the majority of the plan-asymmetric,concrete structures considered in this study with er ≠ 0,the optimal CDC approaches the center of mass as er decreases.

关键词： plan-asymmetric concrete buildings torsion fluid viscous dampers weak torsional balance nonlinear timehistory analysis

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Superior rectus/levator complex in acquired anophthalmic socket repaired with spheric implant—a computed tomography scan and topographic study

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International Journal of Ophthalmology(English edition) 2024年第8期17卷 1483-1488页

作者： Shaikha al Eid Hamad M alSulaiman sahar M Elkhamary Osama al Sheikh alicia Ferrero-Galindo Rajiv Kandekhar Silvana A Schellini Oculoplastic Division King Khaled Eye Specialist HospitalRiyadh 11462Saudi Arabia Radiology Division King Khaled Eye Specialist HospitalRiyadh 11462Saudi Arabia Department of Diagnostic Radiology Mansoura Faculty of MedicineMansoura 35511Egypt University Hospital Rio Hortega Valladolid 47012Spain Research Department King Khaled Eye Specialist HospitalRiyadh 11462Saudi Arabia Ophthalmology Department Medical SchoolState University of Sao PauloBotucatu 18618-687Brazil

AIM:To determine whether the levator palpebrae superioris(LPS)/superior rectus(SR)muscle complex,can influence the position of the upper lid and fornix in acquired anophthalmic ***:This comparative non-randomized and non-interventional study included retrospective data of 21 patients with unilateral acquired anophthalmic sockets repaired with spheric ***-resolution computed tomography(CT)measurements of the LPM/SR muscle complex and clinical topographic position of the upper lid,superior and inferior fornix depth in primary gaze position were *** data were presented as frequency and percentage proportions and quantitative variables comparing the socket measurements with the normal contralateral orbit was statistically analyzed using non-parametric tests considering Palmic orbits had a significantly shorter LPS length(P=0.01)and significantly thicker SR(P=0.02)than the normal *** was present in anophthalmic sockets but not in normal orbits(P=0.002),while levator function was normal in both(P>0.05,all comparisons).The superior fornix depth was similar in the anophthalmic socket and the contralateral normal orbit(P=0.192)as well the inferior fornix depth(P=0.351).CONCLUSION:Acquired anophthalmic sockets repaired with spheric implants have shorter LPS,thicker SR,and more lagophthalmos than normal *** relationship of the LPS and SR with other orbital structures,associated with passive or active forces acting in the final position of the lids and external ocular prosthesis should be further investigated.

关键词： anophthalmic socket spheric implant levator palpebrae superioris superior rectus lagophthalmos fornix depth

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Investigation on the Local Scour Beneath Piggyback Pipelines Under Clear-Water Conditions

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China Ocean Engineering 2021年第3期35卷 422-431页

作者： sahar ASRARI Habib HAKIMZADEH Nazila KARDAN Faculty of Civil Engineering Sahand University of TechnologySahandIran Department of Civil Engineering Azarbaijan Shahid Madani UniversityTabrizIran

A piggyback pipeline consists of two pipes such that the secondary line rides on the main pipe with a fixed distance between two pipes in *** novel strategy is utilized in offshore areas instead of a single flow *** this regard,there are only a handful of experimental and numerical studies investigating the effect of scour below a piggyback pipeline under steady ***,this study focuses on examining the influential factors on scouring due to steady current including the pipe diameter and the gap between pipes through numerical simulations and experimental ***,at the first phase of the research,a single pipe was established and tested in laboratory to compare the results with those of an empirical *** finishing experimental verifications,piggyback pipelines were also assembled to study the scouring under steady current *** was concluded that by increasing the gap distance between the pipes,the maximum scour depth decreases;however,an increase in the small pipe’s diameter results in a larger maximum scour ***,numerical simulations were carried out using the FLOW-3D software which was found to be a suitable tool for the numerical investigation of this ***,the numerical results have been compared with the corresponding experimental data and a relatively good agreement was achieved between them.

关键词： local scour piggyback pipeline scour depth numerical simulation

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