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variations of normal anatomy

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https://www.readbyqxmd.com/read/28337006/challenges-in-x-ray-diagnosis-a-review-of-referrals-for-specialist-opinion
#1
M Dave, K Horner
The aim of this study was to determine the common reasons why a dental professional might request a second opinion on a dental radiograph from a Dental and Maxillofacial (DMF) radiologist. The study was a retrospective analysis of consecutive referrals for an opinion received by post or email by one DMF radiologist based in a UK dental hospital. The study period was from March 2009 to November 2015. Referrals came from a mixture of sources: mainly from general dental practitioners and specialists working in primary care, but with some referrals from hospital-based practitioners...
March 24, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28315152/bilateral-robotic-transabdominal-adrenalectomy-in-a-patient-with-intestinal-malrotation
#2
Zuliang Feng, Carmen C Solórzano
Bilateral adrenalectomy is the preferred surgical approach for patients with failed treatments for pituitary-based Cushing's syndrome. Intestinal malrotation (IM) is a rare congenital anatomic variant that rarely affects adults. The abnormal abdominal anatomy is concerning to surgeons planning elective procedures in such patients. Here, we describe a bilateral robotic transabdominal adrenalectomy (RTA) in a patient with IM. A 29-year-old female presented with refractory pituitary-based Cushing's syndrome and was found to have IM on preoperative CT scan...
March 17, 2017: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/28314908/anatomy-and-aesthetics-of-the-labia-minora-the-ideal-vulva
#3
REVIEW
C Clerico, A Larry, A Mojallal, F Boucher
Female genital cosmetic surgery is becoming more and more widespread both in the field of plastic and gynaecological surgery. The increased demand for vulvar surgery is spurred by the belief that the vulva is abnormal in appearance. What is normal in terms of labial anatomy? Labia minora enlargement or hypertrophy remains a clinical diagnosis which is poorly defined as it could be considered a variation of the normal anatomy. Enlarged labia minora can cause functional, aesthetic and psychosocial problems. In reality, given the wide variety of vulvar morphology among people, it is a very subjective issue to define the "normal" vulva...
March 10, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28297184/the-human-pelvis-variation-in-structure-and-function-during-gait
#4
Cara L Lewis, Natalie M Laudicina, Anne Khuu, Kari L Loverro
The shift to habitual bipedalism 4-6 million years ago in the hominin lineage created a morphologically and functionally different human pelvis compared to our closest living relatives, the chimpanzees. Evolutionary changes to the shape of the pelvis were necessary for the transition to habitual bipedalism in humans. These changes in the bony anatomy resulted in an altered role of muscle function, influencing bipedal gait. Additionally, there are normal sex-specific variations in the pelvis as well as abnormal variations in the acetabulum...
April 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28291931/investigation-of-dosimetric-variations-of-liver-radiotherapy-using-deformable-registration-of-planning-ct-and-cone-beam-ct
#5
Pu Huang, Gang Yu, Jinhu Chen, Changsheng Ma, Shaohua Qin, Yong Yin, Yueqiang Liang, Hongsheng Li, Dengwang Li
Many patients with technically unresectable or medically inoperable hepatocellular carcinoma (HCC) had hepatic anatomy variations as a result of interfraction deformation during fractionated radiotherapy. We conducted this retrospective study to investigate interfractional normal liver dosimetric consequences via reconstructing weekly dose in HCC patients. Twenty-three patients with HCC received conventional fractionated three-dimensional conformal radiation therapy (3DCRT) were enrolled in this retrospective investigation...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28286625/radiographic-evaluation-of-common-pediatric-elbow-injuries
#6
REVIEW
Steven F DeFroda, Heather Hansen, Joseph A Gil, Ashraf H Hawari, Aristides I Cruz
Normal variations in anatomy in the skeletally immature patient may be mistaken for fracture or injury due to the presence of secondary centers of ossification. Variations in imaging exist from patient to patient based on sex, age, and may even vary from one extremity to the other on the same patient. Despite differences in the appearance of the bony anatomy of the elbow there are certain landmarks and relationships, which can help, distinguish normal from abnormal. We review common radiographic parameters and pitfalls associated in the evaluation of pediatric elbow imaging...
February 20, 2017: Orthopedic Reviews
https://www.readbyqxmd.com/read/28270883/the-main-anatomic-variations-of-the-hepatic-artery-and-their-importance-in-surgical-practice-review-of-the-literature
#7
REVIEW
George Noussios, Ioannis Dimitriou, Iosif Chatzis, Anastasios Katsourakis
Anatomical variations of the hepatic artery are important in the planning and performance of abdominal surgical procedures. Normal hepatic anatomy occurs in approximately 80% of cases, for the remaining 20% multiple variations have been described. The purpose of this study was to review the existing literature on the hepatic anatomy and to stress out its importance in surgical practice. Two main databases were searched for eligible articles during the period 2000 - 2015, and results concerning more than 19,000 patients were included in the study...
April 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28255386/variation-in-uterus-position-prior-to-brachytherapy-of-the-cervix-a-case-report
#8
M T Georgescu, R Anghel
Rationale: brachytherapy is administered in the treatment of patients with locally advanced cervical cancer following chemoradiotherapy. Lack of local anatomy evaluation prior to this procedure might lead to the selection of an inappropriate brachytherapy applicator, increasing the risk of side effects (e.g. uterus perforation, painful procedure ...). Objective: To assess the movement of the uterus and cervix prior to brachytherapy in patients with gynecological cancer, in order to select the proper type of brachytherapy applicator...
January 2017: Journal of Medicine and Life
https://www.readbyqxmd.com/read/28250637/analysis-of-the-spinal-nerve-roots-in-relation-to-the-adjacent-vertebral-bodies-with-respect-to-a-posterolateral-vertebral-body-replacement-procedure
#9
Waleed Awwad, Jonathan Bourget-Murray, Nadil Zeiadin, Juan P Mejia, Thomas Steffen, Abdulrahman D Algarni, Khalid Alsaleh, Jean Ouellet, Michael Weber, Peter F Jarzem
OBJECTIVE: This study aims to improve the understanding of the anatomic variations along the thoracic and lumbar spine encountered during an all-posterior vertebrectomy, and reconstruction procedure. This information will help improve our understanding of human spine anatomy and will allow better planning for a vertebral body replacement (VBR) through either a transpedicular or costotransversectomy approach. SUMMARY OF BACKGROUND DATA: The major challenge to a total posterior approach vertebrectomy and VBR in the thoracolumbar spine lies in the preservation of important neural structures...
January 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/28215346/a-micro-computed-tomography-evaluation-of-the-shaping-ability-of-two-nickel-titanium-instruments-hyflex-edm-and-protaper-next
#10
Pier Matteo Venino, Claudio Luigi Citterio, Alberto Pellegatta, Marta Ciccarelli, Marcello Maddalone
INTRODUCTION: The aim of this study was to evaluate and compare, by means of micro-computed tomography imaging, the shaping ability of ProTaper Next (PTN) and the novel HyFlex EDM (HFEDM) instruments. METHODS: Forty teeth were randomly divided into 2 groups and prepared with PTN or HFEDM. Root canal transportation and centering ratio were evaluated in mesiodistal and buccolingual directions at 5 levels (at the midpoint of the apical, middle, and coronal thirds and at the boundaries between them)...
April 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28210449/oral-mucosal-lesions-in-a-chilean-elderly-population-a-retrospective-study-with-a-systematic-review-from-thirteen-countries
#11
César Rivera, Daniel Droguett, María-Jesús Arenas-Márquez
BACKGROUND: The oral examination is an essential part of the multidisciplinary medical care in elderly people. Oral mucosal lesions and normal variations of oral anatomy (OMLs) are very common in this people, but few studies have examined the frequency and prevalence of these conditions worldwide and less in Chile. The aim of this research was to evaluate the frequency of OMLs in a Chilean elderly population. MATERIAL AND METHODS: It was conducted a retrospective study (Talca, Chile)...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28179915/a-review-on-root-anatomy-and-canal-configuration-of-the-maxillary-second-molars
#12
REVIEW
Negin Ghasemi, Saeed Rahimi, Shahriar Shahi, Mohammad Samiei, Mohammad Frough Reyhani, Bahram Ranjkesh
INTRODUCTION: The complexity of the root canal system presents a challenge for the practitioner. This systematic review evaluated the papers published in the field of root canal anatomy and configuration of the root canal system in permanent maxillary second molars. METHODS AND MATERIALS: All articles related to the root morphology and root canal anatomy of the permanent maxillary second molars were collected by suitable keywords from PubMed database. The exhaustive search included all publications from 1981 to December 2015...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28177991/variations-in-the-vascular-anatomy-of-the-right-colon-and-implications-for-right-sided-colon-surgery
#13
Mehmet Ayhan Kuzu, Erkin İsmail, Safa Çelik, Muhammed Feyzi Şahin, Mehmet Ali Güner, Werner Hohenberger, Halil İbrahim Açar
BACKGROUND: Knowledge of the normal pattern and variations of the blood supply of the right colon is crucial for better outcomes after colon surgery. OBJECTIVE: The purpose of this study was to describe the precise vascular anatomy of the right colon according to surgical perspective. DESIGN: Adult fresh cadavers were dissected between January 2013 and October 2015, focusing on the venous and arterial anatomy of the right side of the colon...
March 2017: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/28150270/circle-of-willis-variations-and-artery-diameter-measurements-in-the-turkish-population
#14
Ibrahim Önder Yeniçeri, Neşat Çullu, Mehmet Deveer, Emine Neşe Yeniçeri
BACKGROUND: The aim of this study was to evaluate the frequency of COW variations and the measurements of the COW vessel diameters in the Turkish population. MATERIALS AND METHODS: The patient population for this single-centre, retrospective study was formed of patients who had brain MRA. A total of 384 subjects were included in the study. The 3D TOF technique was used for MRA imaging to evaluate the anatomy of the COW. Variations in the COW were recorded. The diameter of the critical arteries of the COW were measured...
February 2, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28143859/replaced-right-and-left-hepatic-arteries-a-variation-in-origin-and-course
#15
Mohammed Asif, Leslie S Anewenah, Nisha Reddy, Farrukh A Khan
In ∼60% of cases, hepatic artery anatomy is of the normal variant. However, in 40% of cases, anomalies can exist. Preserving the hepatic blood supply is paramount in hepatobiliary procedures. We report an aberrant right hepatic artery coursing retroportally, with an aberrant left hepatic artery originating directly from the coeliac artery in a patient who underwent an elective pancreaticoduodenectomy (Whipple procedure).
January 31, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28139318/cochlear-duct-length-one-size-fits-all
#16
J F Thong, D Low, A Tham, C Liew, T Y Tan, H W Yuen
OBJECTIVE: Recent studies demonstrated the utility of high-resolution computed tomography (HRCT) scans in measuring basal cochlear length and cochlear insertion depths. These studies showed significant variations in the anatomy of the cochlea amongst humans. The aim of our study was to investigate for gender and racial variations in the basal turn length of the human cochlea in an Asian population. METHOD: HRCT temporal bone data from year 1997 till 2012 of patients with normally developed cochleae who reported with otologic disease was obtained...
March 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/28103500/thoracoscopic-surgery-in-the-prone-position-for-esophageal-cancer-in-patients-with-situs-inversus-totalis-a-report-of-two-cases
#17
Toru Nakano, Takashi Kamei, Yu Onodera, Naoto Ujiie, Noriaki Ohuchi
INTRODUCTION: Situs inversus totalis (SIT) is a rare congenital condition characterized by a complete transposition of thoracic and abdominal organs. Here, we present two successful cases of left thoracoscopic esophagectomy in the prone position for SIT-associated esophageal cancer. PRESENTATION OF CASE: Our first case was of an 82-year-old man who underwent a left thoracoscopic esophagectomy in the prone position, followed by hand-assisted laparoscopic gastric mobilization...
January 6, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28076015/us-and-mr-imaging-of-pectoralis-major-injuries
#18
Yauk K Lee, Matt R Skalski, Eric A White, Anderanik Tomasian, Diane D Phan, Dakshesh B Patel, George R Matcuk, Aaron J Schein
During the past 2 decades, the frequency of pectoralis major muscle injuries has increased in association with the increased popularity of bench press exercises. Injury of the pectoralis major can occur at the muscle origin, muscle belly, musculotendinous junction, intratendinous region, and/or humeral insertion-with or without bone avulsion. The extent of the tendon injury ranges from partial to complete tears. Treatment may be surgical or conservative, depending on the clinical scenario and anatomic characteristics of the injury...
January 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28066735/arthroscopic-approach-and-anatomy-of-the-hip
#19
Alessandro Aprato, Matteo Giachino, Alessandro Masse
BACKGROUND: Hip arthroscopy has gained popularity among the orthopedic community and a precise assessment of indications, techniques and results is constantly brought on. METHODS: In this chapter the principal standard entry portals for central and peripheral compartment are discussed. The description starts from the superficial landmarks for portals placement and continues with the deep layers. For each entry point an illustration of the main structures encountered is provided and the principal structures at risk for different portals are accurately examined...
July 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28048870/su-f-j-81-evaluation-of-automated-deformable-registration-between-planning-computed-tomography-ct-and-daily-cone-beam-ct-images-over-the-course-of-prostate-cancer-radiotherapy
#20
J Matney, J Hammers, O Kaidar-Person, A Wang, R Chen, S Das, L Marks, P Mavroidis
PURPOSE: To compute daily dose delivered during radiotherapy, deformable registration needs to be relatively fast, automated, and accurate. The aim of this study was to evaluate the performance of commercial deformable registration software for deforming between two modalities: planning computed tomography (pCT) images acquired for treatment planning and cone beam (CB) CT images acquired prior to each fraction of prostate cancer radiotherapy. METHODS: A workflow was designed using MIM Software™ that aligned and deformed pCT into daily CBCT images in two steps: (1) rigid shifts applied after daily CBCT imaging to align patient anatomy to the pCT and (2) normalized intensity-based deformable registration to account for interfractional anatomical variations...
June 2016: Medical Physics
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