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Neurosurgical anatomy of the floor of the third ventricle and related vascular structures.

Surg Radiol Anat 2021 Jun 14. Epub 2021 Jun 14.

Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Alameda Professor Hernâni Monteiro, 4200-319, Porto, Portugal.

Purpose: Anatomical knowledge of the floor of the third ventricle (FTV) is essential in avoiding surgical complications during endoscopic third ventriculostomy. The purpose of this study was to characterize the morphometry of FTV and related arteries, particularly the basilar artery (BA), as well as the factors that influence it.

Methods: Twenty-six formalin-fixed adult brains and two hundred adult brain MRIs were studied focusing on FTV and related arteries. Read More

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Useful Ultrasonographic Parameters to Predict Difficult Laryngoscopy and Difficult Tracheal Intubation-A Systematic Review and Meta-Analysis.

Front Med (Lausanne) 2021 28;8:671658. Epub 2021 May 28.

School of Medicine, Life and Health Sciences Research Institute (ICVS), University of Minho, Braga, Portugal.

Unexpected difficult airway management can cause significant morbidity and mortality in patients admitted for elective procedures. Ultrasonography is a promising tool for perioperative airway assessment, nevertheless it is still unclear which sonographic parameters are useful predictors of difficult laryngoscopy and tracheal intubation. To determine the ultrasonographic predictors of a difficult airway that could be applied for routine practice, a systematic review and meta-analysis was conducted. Read More

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Kinematic Characteristics of Male Runners With a History of Recurrent Calf Muscle Strain Injury.

Int J Sports Phys Ther 2021 Jun 1;16(3):732-740. Epub 2021 Jun 1.

University of Salford.

Background: Calf muscle strain injuries are a common running injury affecting male runners and are known to have high reoccurrence rates. Currently, limited evidence exists investigating factors associated with this injury with no previous study investigating the running kinematics of male runners with a history of repeat calf muscle strain injuries.

Purpose: To investigate whether male runners with a history of repeat calf muscle strain injury demonstrate differences in stance phase running kinematics when compared to healthy controls. Read More

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Reproducibility of vaginal immobilization balloons overnight for cervical cancer brachytherapy.

J Contemp Brachytherapy 2021 Jun 13;13(3):280-285. Epub 2021 May 13.

Department of Radiation Oncology, University of Arizona College of Medicine, Tucson, USA.

Purpose: The use of vaginal immobilization balloons placed into the vagina for immobilization of tandem and ovoid (T+O) applicator during high-dose-rate (HDR) brachytherapy delivery has been used at our institution, and seems to have improved our patient comfort, decreased procedure time, and minimized applicator misplacement. We aimed to show that these balloons, while originally marketed for single-day use, are safe and maintain applicator positioning/dosimetry when left overnight for treatment delivery on sequential days.

Material And Methods: Forty-two paired computed tomography (CT) scans from thirteen patients who underwent T+O HDR treatments on sequential days with vaginal immobilization balloons overnight were retrospectively compared to calculate mean change of balloon volumes and balloon/T+O distance to bony landmarks. Read More

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Tomographic evaluation of the mandibular nerve in the mental region and its surgical implications: a cross-sectional study.

Int J Oral Maxillofac Surg 2021 Jun 10. Epub 2021 Jun 10.

Department of Postgraduation, ILAPEO College, Curitiba, Paraná, Brazil.

The aim of this study was to evaluate the prevalence and length of the anterior loop (AL) of the inferior alveolar nerve, nerve emergence from the mental foramen, and prevalence of sensory disorders after implant placement in the interforaminal region. Four hundred and fifty hemimandibles (225 patients) were evaluated using cone beam computed tomography and panoramic radiographs. Information on the presence of sensory disorders was obtained from the medical records. Read More

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Mechanical force system of double key loop with finite element analysis.

BMC Oral Health 2021 Jun 13;21(1):301. Epub 2021 Jun 13.

Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China.

Background: The mechanics of double key loop (DKL) are not well defined, and this finite element study was designed to explore its force system.

Methods: A simplified 3-dimensional finite element model of single and double key loops with an archwire between the lateral incisor and second premolar was established in Ansys Workbench 17.0. Read More

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The relative locations of the supraorbital, infraorbital, and mental foramina: A cadaveric study.

J Anat 2021 Jun 12. Epub 2021 Jun 12.

Department of Cell Systems and Anatomy, UT Health San Antonio, San Antonio, Texas, USA.

The purpose of this study is to investigate the applicability of the current surgical guideline stating that the main facial foramina that transmit cutaneous nerves to the face (supraorbital notch/foramen, infraorbital foramen, and mental foramen) are equidistant from the midline in European and Hispanic populations. Previous studies suggest this surgical guideline is not applicable for all ethnicities; however, to our knowledge, no data have been published regarding the accuracy of this guideline pertaining to the Hispanic population. An experimental study was performed on 67 cadavers donated to the Human Anatomy Program at UT Health San Antonio. Read More

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Interatrial distance predicts the necessity of additional carina ablation to isolate the right-sided pulmonary veins.

Heart Rhythm O2 2020 Oct 25;1(4):259-267. Epub 2020 Aug 25.

Department of Cardiology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.

Background: Ablation of the pulmonary vein (PV) carina is occasionally required for PV isolation (PVI). Marshall bundle and epicardial connections between the right-sided PV (RtPV) carina and right atrium (RA) may be one of the mechanisms that necessitates carina ablation.

Objective: We sought to clarify anatomical characteristics predictive of the necessity of carina ablation. Read More

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October 2020

Spatial relationship between the pulmonary trunk and the left coronaries: Systematic risk assessment based on automated three-dimensional distance measurements.

Heart Rhythm O2 2020 Apr 27;1(1):14-20. Epub 2020 Apr 27.

Informatics for Life, Heidelberg, Germany.

Background: Catheter ablation of right ventricular outflow tract ventricular arrhythmias from above the pulmonary valve is being increasingly reported.

Objective: The purpose of this study was to systematically analyze the spatial relationship between the pulmonary trunk and the left coronaries.

Methods: Contrast-enhanced computed tomographic scans from 58 patients were analyzed. Read More

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Short-Term Clinical Outcomes of Transcatheter Tricuspid Valve Repair With the Third-Generation MitraClip XTR System.

JACC Cardiovasc Interv 2021 Jun;14(11):1231-1240

Department of Cardiology, Heart Valve Center, University Medical Center Mainz, Mainz, Germany.

Objectives: The aim of this study was to assess 30-day outcomes of transcatheter edge-to-edge repair with the MitraClip XTR for significant tricuspid regurgitation (TR), relative to baseline coaptation gap sizes (CGS).

Background: Transcatheter edge-to-edge repair using the MitraClip NT for patients with significant TR is safe and efficacious; the utility of the MitraClip XTR is unknown.

Methods: Patients with significant, symptomatic TR treated at a single site between April 2018 and December 2019, with consent and with complete data, were included (n = 50). Read More

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Anterior Chamber Measurements in Healthy Children: A Cross-Sectional Study Using Optical Coherence Tomography.

Transl Vis Sci Technol 2021 May;10(6):13

University of Leicester Ulverscroft Eye Unit, Department of Neuroscience, Psychology and Behaviour, University of Leicester, Leicester, UK.

Purpose: To establish anterior chamber measurements in children and investigate the influence of demographic factors on anterior chamber development.

Methods: Handheld optical coherence tomography was used to scan the anterior chamber of participants' eyes, without sedation. ImageJ was used to generate quantitative anterior chamber measurements, including central corneal thickness (CCT), anterior chamber width, trabecular meshwork length (TML), Schwalbe's line-angle opening distance (SL-AOD), and trabecular iris surface area (SL-TISA). Read More

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Stride-to-Stride Variability of the Center of Mass in Male Trained Runners After an Exhaustive Run: A Three Dimensional Movement Variability Analysis With a Subject-Specific Anthropometric Model.

Front Sports Act Living 2021 24;3:665500. Epub 2021 May 24.

BioMotion Center, Institute of Sports and Sports Science (IfSS), Karlsruhe Institute of Technology, Karlsruhe, Germany.

The motion of the human body can be described by the motion of its center of mass (CoM). Since the trajectory of the CoM is a crucial variable during running, one can assume that trained runners would try to keep their CoM trajectory constant from stride to stride. However, when exposed to fatigue, runners might have to adapt certain biomechanical parameters. Read More

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A system review and meta-analysis of the treatment of acute angle-closure glaucoma under optical coherence tomography.

Ann Palliat Med 2021 May;10(5):5659-5670

Department of Ophthalmology, Affiliated Hospital of Hebei University, Baoding, China.

Background: A meta-analysis was conducted to investigate the value of treatment-related indicators of acute angle-closure glaucoma (AACG) based on optical coherence tomography (OCT) to evaluate the curative effect.

Methods: Articles on the treatment of AACG in clinical research of OCT published from January 2010 to June 2020 were retrieved from the PubMed, Web of Science, and Spring databases. RevMan 5. Read More

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Three-Dimensional Sonographic Evaluation of the Position of the Fetal Conus Medullaris at First Trimester.

Fetal Diagn Ther 2021 Jun 9:1-8. Epub 2021 Jun 9.

Department of Medicine and Surgery, Obstetrics and Gynecology Unit, University of Parma, Parma, Italy.

Objective: The objective of this study was to assess the position of the conus medullaris (CM) at the first trimester 3D ultrasound in a cohort of structurally normal fetuses.

Methods: This was a multicenter prospective study involving a consecutive series of structurally normal fetuses between 11 and 13 weeks of gestation (CRL between 45 and 84 mm). All fetuses were submitted to 3D transvaginal ultrasound using a sagittal view of the spine as the starting plane of acquisition. Read More

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Comparison of Femtosecond Laser-Assisted Cataract Surgery and Conventional Phacoemulsification in Shallow Anterior Chambers and Glaucoma.

J Ophthalmol 2020 16;2020:3690528. Epub 2020 Nov 16.

Department of Ophthalmology, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, Guangxi, China.

Purpose: To compare femtosecond laser-assisted cataract surgery (FLACS) versus conventional phacoemulsification in shallow anterior chamber cataract patients with glaucoma or zonulysis.

Methods: This was a single-center retrospective review of cataract surgeries in shallow anterior chamber and glaucoma patients between January 2016 and December 2018 in which a LenSx femtosecond laser was used. The outcome measures included pre- and postoperative uncorrected and corrected distance visual acuity (UDVA and CDVA), intraocular pressure (IOP), endothelial cell density (ECD), endothelial cell loss (ECL), and object scatter index (OSI). Read More

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November 2020

Comparison of the Structure and Function of the Retina and the Optic Nerve in Patients with a History of Multiple Sclerosis-Related Demyelinating Retrobulbar Optic Neuritis Treated and Not Treated with Systemic Steroid Therapy.

Clin Ophthalmol 2021 1;15:2253-2261. Epub 2021 Jun 1.

2nd Department of Ophthalmology, Pomeranian Medical University, Szczecin, Poland.

Purpose: To compare the structure and function of the retina and the optic nerve in patients with a history of multiple sclerosis (MS)-related demyelinating retrobulbar optic neuritis treated and not treated with systemic steroid therapy.

Patients And Methods: Thirty-two eyes of 32 MS patients with a past single episode of MS-related demyelinating retrobulbar ON were divided into 2 groups: S(+) consisting of 16 patients treated with intravenous methylprednisolone at a dose of 1g/day for 3 days during the acute stage of ON and S(-) consisting of 16 patients who did not receive any treatment. The following examinations were performed: distance best-corrected visual acuity (DBCVA) (Snellen), slit-lamp examination of the anterior and posterior segment of the eye (90D Volk lens), visual field analysis (Carl Zeiss Humphrey 750 Visual Field Analyzer, 24-2, W-W), macular thickness in the foveal (RT1) and parafoveal region (RT2), as well as peripapillary retinal nerve fiber layer thickness (RNFL) in the temporal, superior, nasal and inferior quadrants (Carl Zeiss Cirrus HD-OCT), assessment of the bioelectrical function of the visual pathway with an emphasis on the optic nerve - pattern visual evoked potentials (PVEP) and of macular ganglion cells and cone photoreceptors - pattern electroretinogram (PERG) (Roland Consult). Read More

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The effect of pre-treatment levels of tooth wear and the applied increase in the vertical dimension of occlusion (VDO) on the survival of direct resin composite restorations.

J Dent 2021 Jun 5:103712. Epub 2021 Jun 5.

Department of Dentistry, Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands.

Objectives: To investigate the effects of the level of pre-treatment tooth wear and increasing the VDO on the performance of direct resin composite restorations for the rehabilitation of pathological tooth wear.

Methods: Full-mouth (pre-treatment) grading was performed on digital greyscale scan records for 34 participants (35.3 ± 8. Read More

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The Relationship Between Arm Abduction Position and the Risk of Iatrogenic Anterior Branch of the Axillary Nerve Injuries: A Cadaveric Study.

Orthop J Sports Med 2021 May 20;9(5):23259671211008834. Epub 2021 May 20.

Department of Orthopedics, Faculty of Medicine, Prince of Songkla University, Hat Yai, Thailand.

Background: The axillary nerve is at risk for iatrogenic injuries in surgical procedures involving the lateral aspect of the shoulder joint. To date and to our knowledge, there have been no studies that have compared the relevant distances in the common arm abduction positions used in these types of surgery as well as the relative risks of each position.

Purpose: To evaluate the effect of arm abduction position on the distance from the acromion process to the axillary nerve in the common abducted arm positions. Read More

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Optimal Implantation Site of Orthodontic Micro-Screws in the Mandibular Anterior Region Based on CBCT.

Front Physiol 2021 20;12:630859. Epub 2021 May 20.

The Sixth Medical Center of PLA General Hospital, Beijing, China.

To determine the optimal implantation site of orthodontic micro-screws based on cone beam computed tomography (CBCT) analysis in the mandibular anterior tooth region, provide a theoretical basis for orthodontic implant placement and improve post-implantation stability. Forty patients who underwent CBCT scanning were selected for this study. CBCT scanning was applied to measure the interradicular distance, buccolingual dimension, labial cortical bone thickness and lingual cortical bone thickness between mandibular anterior teeth at planes 2, 4, 6, and 8 mm below the alveolar ridge crest. Read More

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Significance of Cervical Spine Computed Tomography Hounsfield Units to Predict Bone Mineral Density and the Subsidence After Anterior Cervical Discectomy and Fusion.

Clin Spine Surg 2021 Jun 7. Epub 2021 Jun 7.

Department of Neurosurgery, St. Vincent Hospital, College of Medicine, The Catholic University of Korea, Suwon Department of Neurosurgery, Seoul Medical Center Department of Neurosurgery, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, College of Medicine, Seoul, Korea.

Study Design: This study was a retrospective review.

Objective: The purpose of this study was to investigate the correlation analysis between Hounsfield units (HU) and dual x-ray absorptiometry (DXA) based on the clinical results of patients who underwent anterior cervical discectomy and fusion (ACDF) surgery.

Summary Of Background Data: There is no technique to directly measure bone mineral density (BMD) in the cervical spine. Read More

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Evaluation of the Pubocervical Fascia with 3-Dimensional Endovaginal Ultrasonography and Correlation with Intraoperative Findings during Robotic Sacrocervicopexy.

Urology 2021 Jun 3. Epub 2021 Jun 3.

Department of Surgery, Division of Urology and Gynecology, Cleveland Clinic Indian River Hospital, Vero Beach, FL, USA; Florida State University College of Medicine, Fort Pierce Campus, FL, USA.

Objectives: To evaluate the pubocervical fascia (PF) in patients with pelvic organ prolapse (POP) using 3-dimensonal endovaginal ultrasonography (EVUS) and to correlate the PF appearance with both pelvic examination and intraoperative findings during ultrasonographic robotic-assisted laparoscopic sacrocervicopexy and pubocervical fascia reconstruction (u-RALS-PFR).

Methods: A retrospective analysis was performed in 120 women with symptomatic POP. Preoperative evaluation was done using EVUS. Read More

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Gender- and age-related differences in the width of attached gingiva and clinical crown length in anterior teeth.

BMC Oral Health 2021 06 4;21(1):287. Epub 2021 Jun 4.

Department of Oral and Maxillofacial Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität Zu Berlin, Augustenburger Platz 1, 13353, Berlin, Germany.

Background: The anatomical features of the gingiva and the clinical crowns and their interrelation, especially in aesthetically and functionally demanding areas, are important in complex dental or implant-retained prosthetic rehabilitations. This observational cross-sectional study was designed to evaluate gender- and age-related differences in the width of attached gingiva (WAG), the clinical crown length (CCL), and their interrelation in the anterior teeth to determine the relationship between the pink and white aesthetics.

Methods: Eighty (54 females, 26 males) fully dentate Caucasian participants between the ages of 20 and 25 years and 36 probands (23 females, 13 males) between the ages of 45 and 55 years were included in the present study. Read More

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High Rate of Initially Overlooked Kaplan Fiber Complex Injuries in Patients With Isolated Anterior Cruciate Ligament Injury.

Am J Sports Med 2021 Jun 4:3635465211015682. Epub 2021 Jun 4.

Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, USA.

Background: Injuries to the Kaplan fiber complex (KFC) are not routinely assessed for in the anterior cruciate ligament (ACL)-deficient knee during preoperative magnetic resonance imaging (MRI). As injuries to the KFC lead to anterolateral rotatory instability (ALRI) in the ACL-deficient knee, preoperative detection of these injuries on MRI scans may help surgeons to individualize treatment and improve outcomes, as well as to reduce failure rates.

Purpose: To retrospectively determine the rate of initially overlooked KFC injuries on routine MRI in knees with isolated primary ACL deficiency. Read More

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Root canal isthmi and interorifice distance in human permanent teeth of an Indian subpopulation using cone-beam computed tomography: A retrospective cross-sectional study.

J Conserv Dent 2020 Nov-Dec;23(6):563-570. Epub 2021 Feb 11.

Department of Conservative Dentistry and Endodontics, Sri Venkateswara Dental College and Hospital, Chennai, Tamil Nadu, India.

Objective: The aim of the study was to evaluate the prevalence of root canal isthmus (RCI) and measure the interorifice distance (IOD) between the root canals. Additionally to correlate IOD with the RCI in human permanent teeth using conebeam computed tomography (CBCT) in an Indian sub-population (Chennai).

Materials And Methods: A total of 5881 teeth from 280 CBCT full mouth scans were analyzed. Read More

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February 2021

Multiple synaptic connections into a single cortical pyramidal cell or interneuron in the anterior cingulate cortex of adult mice.

Mol Brain 2021 Jun 3;14(1):88. Epub 2021 Jun 3.

Department of Physiology, Faculty of Medicine, University of Toronto, Medical Science Building, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada.

The ACC is an important brain area for the processing of pain-related information. Studies of synaptic connections within the ACC provide an understanding of basic cellular and molecular mechanisms for brain functions such as pain, emotion and related cognitive functions. Previous study of ACC synaptic transmission mainly focused on presumably thalamic inputs into pyramidal cells. Read More

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Extended Anterior Approach for Proximal Femur Resection and Hip Reconstruction. Technique Description and Case Report of Three Oncologic Patients.

Bull Hosp Jt Dis (2013) 2021 Jun;79(2):130-136

This retrospective case report describes an extended anterior surgical approach for treating oncologic patients with proximal femur resection and hip reconstruction. Three consecutive women (mean age: 57.3; range: 33 to 81 years) with non-Hodgkins lymphoma (one case) or breast cancer (two cases) that had metastasized to the proximal femur underwent this procedure. Read More

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Sex differences in postural orientation errors and association with objective and patient-reported function in patients with ACL injury: an exploratory cross-sectional study.

BMJ Open Sport Exerc Med 2021 19;7(2):e001045. Epub 2021 May 19.

Health Sciences, Lund University, Lund, Sweden.

Objectives: There is limited research on sex differences in postural orientation (ie, alignment between body segments) in people with knee injury measured with a clinically applicable method. An understanding of the relationship between postural orientation and physical function may help guide decision making in rehabilitation. The aims were to evaluate (1) sex differences in visual assessment of Postural Orientation Errors (POEs) and (2) the association between POEs and objective and patient-reported physical function, in men and women with anterior cruciate ligament reconstruction (ACLR). Read More

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Extending the limbus-to-cannula distance to 6.0 mm during pars plana vitrectomy in highly myopic eyes.

Retina 2020 Nov 25. Epub 2020 Nov 25.

1Osaka Rosai Hospital Clinical Research Center for Optical Sensory Organ Disability, Osaka, Japan 2Department of Ophthalmology, Osaka University Graduate School of Medicine, Osaka, Japan.

Purpose: To evaluate the utility of extending the limbus-to-cannula distance to 6.0 mm during pars plana vitrectomy (PPV) for highly myopic eyes.

Methods: Four eyes with axial lengths exceeding 31. Read More

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November 2020

Comparison between robotic natural orifice specimen extraction surgery and traditional laparoscopic low anterior resection for middle and low rectal cancer: A propensity score matching analysis.

J Surg Oncol 2021 Jun 2. Epub 2021 Jun 2.

General Surgery Department, Zhongshan Hospital, Fudan University, Shanghai, China.

Background And Objectives: This study aimed to find the advantages of robotic natural orifice specimen extraction surgery (NOSES) for middle and low rectal cancer, compared with traditional laparoscopic low anterior resection (LAR).

Methods: Patients receiving robotic NOSES or traditional laparoscopic LAR were retrospectively enrolled from 2013-10 to 2019-06, with middle and low rectal cancer, maximum diameter ≤ 5 cm, pT1-3 or ypT1-3 stage, no distant metastases. The baseline of the two groups was balanced using the propensity score matching method. Read More

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Ureteral injury following anterior thoracolumbar spinal instrumented fusion for adolescent idiopathic scoliosis: a case report with CT angiography analysis of surgically relevant anatomy.

Spine Deform 2021 Jun 1. Epub 2021 Jun 1.

Department of Orthopaedic Surgery, University of California, San Francisco (UCSF), 1825 4th St., San Francisco, CA, 94158, USA.

Purpose: To report a rare ureteral injury following anterior spinal fusion for adolescent idiopathic scoliosis (AIS) that resulted in complete nephrectomy and to delineate the anatomical relationship between the proximal ureter and the anterior lumbar spine based on CT angiography (CTA).

Methods: Thoracolumbar spine CTAs of children with AIS were reviewed. We measured the following relationships to the ureters: lateral-most aspect of vertebral body, anterior psoas at intervertebral disc/vertebral body levels, and lateral psoas at vertebral body level. Read More

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