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Anatomic variations

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https://www.readbyqxmd.com/read/29226038/pencil-beam-scanning-proton-therapy-for-rhabdomyosarcoma-of-the-biliary-tract
#1
Luke Pater, Brian Turpin, Anthony Mascia
Rhabdomyosarcoma (RMS) is the most common soft tissue sarcoma of childhood with 250-350 cases diagnosed annually in the United States. Biliary tract rhabdomyosarcoma is rare, representing <1% of the RMS cases. Due to its location, resection is clinically challenging, and functional complications exist and persist from biliary obstruction. The anatomical location of this tumor presents both opportunities and challenges for pencil beam scanning proton therapy. Proton therapy offers a dosimetric and clinical advantage by sparing the healthy liver, stomach, contra-lateral kidney and bowel...
October 5, 2017: Curēus
https://www.readbyqxmd.com/read/29226008/variation-in-results-release-and-patient-portal-access-to-diagnostic-test-results-at-an-academic-medical-center
#2
Matthew D Krasowski, Caleb V Grieme, Brian Cassady, Nicholas R Dreyer, Karolyn A Wanat, Maia Hightower, Kenneth G Nepple
Background: Electronic health records (EHRs) are commonplace in industrialized countries. Many hospitals are granting their patients access to their medical information through online patient portals. In this report, we describe a retrospective analysis of patient access to diagnostic test results released through the patient portal (MyChart; Epic, Inc.) at a state academic medical center. Methods: We analyzed 6 months of data for anatomic pathology, clinical laboratory, and radiology test results to evaluate variations in results release (automated vs...
2017: Journal of Pathology Informatics
https://www.readbyqxmd.com/read/29226006/next-generation-quality-assessing-the-physician-in-clinical-history-completeness-and-diagnostic-interpretations-using-funnel-plots-and-normalized-deviations-plots-in-3-854-prostate-biopsies
#3
Michael Bonert, Ihab El-Shinnawy, Michael Carvalho, Phillip Williams, Samih Salama, Damu Tang, Anil Kapoor
Background: Observational data and funnel plots are routinely used outside of pathology to understand trends and improve performance. Objective: Extract diagnostic rate (DR) information from free text surgical pathology reports with synoptic elements and assess whether inter-rater variation and clinical history completeness information useful for continuous quality improvement (CQI) can be obtained. Methods: All in-house prostate biopsies in a 6-year period at two large teaching hospitals were extracted and then diagnostically categorized using string matching, fuzzy string matching, and hierarchical pruning...
2017: Journal of Pathology Informatics
https://www.readbyqxmd.com/read/29225513/an-abrupt-bleeding-of-the-anteriorly-displaced-sigmoid-sinus-a-rare-complication-of-myringoplasty
#4
Sarah Zaher Addeen, Mohammad Al-Mohammad
Background: The location of the sigmoid sinus within the mastoid cavity is quite variable. An anteriorly- displaced vertical segment of the sigmoid sinus constitutes an uncommon but dangerous anatomical variation that surgeons rarely encounter during surgery. In this variation, the sigmoid sinus lays underneath a very thin bony flap, which makes it easily damaged. Thus, an abrupt fatal bleeding might occur. Despite the many hypotheses about its origin (Chronic otitis media, hypopneumatization, etc...
2017: BMC Ear, Nose, and Throat Disorders
https://www.readbyqxmd.com/read/29225065/an-unbiased-data-driven-age-related-structural-brain-parcellation-for-the-identification-of-intrinsic-brain-volume-changes-over-the-adult-lifespan
#5
Epifanio Bagarinao, Hirohisa Watanabe, Satoshi Maesawa, Daisuke Mori, Kazuhiro Hara, Kazuya Kawabata, Noritaka Yoneyama, Reiko Ohdake, Kazunori Imai, Michihito Masuda, Takamasa Yokoi, Aya Ogura, Toshihiko Wakabayashi, Masafumi Kuzuya, Norio Ozaki, Minoru Hoshiyama, Haruo Isoda, Shinji Naganawa, Gen Sobue
This study aims to elucidate age-related intrinsic brain volume changes over the adult lifespan using an unbiased data-driven structural brain parcellation. Anatomical brain images from a cohort of 293 healthy volunteers ranging in age from 21 - 86 years were analyzed using independent component analysis (ICA). ICA-based parcellation identified 192 component images, of which 174 (90.6%) showed a significant negative correlation with age and with some components being more vulnerable to aging effects than others...
December 7, 2017: NeuroImage
https://www.readbyqxmd.com/read/29220090/mesophyll-conductance-in-zea-mays-responds-transiently-to-co2-availability-implications-for-transpiration-efficiency-in-c4-crops
#6
Allison R Kolbe, Asaph B Cousins
Mesophyll conductance (gm ) describes the movement of CO2 from the intercellular air spaces below the stomata to the site of initial carboxylation in the mesophyll. In contrast with C3 -gm , little is currently known about the intraspecific variation in C4 -gm or its responsiveness to environmental stimuli. To address these questions, gm was measured on five maize (Zea mays) lines in response to CO2 , employing three different estimates of gm . Each of the methods indicated a significant response of gm to CO2 ...
December 8, 2017: New Phytologist
https://www.readbyqxmd.com/read/29219191/the-development-of-the-human-hyoid-larynx-complex-revisited
#7
Bernadette S de Bakker, Henri M de Bakker, Vidija Soerdjbalie-Maikoe, Frederik G Dikkers
OBJECTIVES/HYPOTHESIS: The hyoid-larynx complex is highly prone to anatomical variation. The etiology of anatomical variants such as Eagle's syndrome and the aberrant hyoid apparatus can be explained from embryonic development. Modern textbooks state that the hyoid bone body develops from the second and third pharyngeal arch cartilages, and that thyroid cartilage derives from the fourth and sixth arch cartilages. This description, however, is incompatible with various anatomical variants, and it is unclear whether it was based on observations in human embryos or on comparative embryology...
December 8, 2017: Laryngoscope
https://www.readbyqxmd.com/read/29218385/bilateral-carotid-anterior-cerebral-artery-anastomoses-associated-with-bilateral-ophthalmic-arteries-arising-from-the-anastomotic-arteries-diagnosed-by-magnetic-resonance-angiography-a-case-report
#8
Akira Uchino, Naoko Saito, Norio Tanahashi
Rarely, the anterior cerebral artery (ACA) arises from the ophthalmic segment of the internal carotid artery, a condition described as carotid-ACA anastomosis or infraoptic course of the ACA that generally demonstrates right-sided predominance. We diagnosed a case of bilateral anastomoses of the carotid and ACA vessels in which bilateral ophthalmic arteries arose from the origins of the anastomotic vessels using magnetic resonance (MR) angiography. Identification of rare arterial variations on MR angiography requires careful scrutiny of source images, and creation of partial volume-rendering images can aid visualization of detailed anatomic structures...
December 7, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29218256/intracranial-anatomical-triangles-a-comprehensive-illustrated-review
#9
REVIEW
Doniel Drazin, Joy Mh Wang, Fernando Alonso, Daxa M Patel, Andre Granger, Mohammadali M Shoja, Marios Loukas, Rod J Oskouian, R Shane Tubbs
There are multiple anatomical triangles of the skull base. However, to our knowledge, there has been no comprehensive review of these geometric landmarks. To allow for a safe and consistent approach to lesions of the skull base such as those near the internal carotid artery, internal acoustic meatus, and cavernous sinus, a comprehensive review of the variations with illustrations is required. This article provides an overview of the anatomical borders, dimensions, and surgical implications as well as illustrations of the major skull base triangles...
October 4, 2017: Curēus
https://www.readbyqxmd.com/read/29218232/the-role-of-neurectomy-in-the-management-of-spasticity-of-the-upper-limb
#10
Petros Mikalef, Dominic Power
Neurectomy is one of the treatments available to the surgeon treating patients with spasticity of the upper limb.Its popularity has increased in recent years.Accurate knowledge of the anatomical variations of the terminal branches to the muscles is required in order to achieve a successful outcome.Although the anatomy has been thoroughly studied, there are still controversies regarding the percentage of the nerve to be resected for a successful result, and also regarding the terminology that has been used in the literature to describe the procedure...
November 2017: EFORT Open Reviews
https://www.readbyqxmd.com/read/29218209/anomalous-origin-of-the-right-colic-artery-from-the-right-gastroepiploic-artery-during-complete-mesocolic-excision-a-rare-case-report
#11
Menelaos Zoulamoglou, Maria Zarokosta, Panagiotis Theodoropoulos, Dimosthenis Kakaviatos, Ioannis Kaklamanos, Ioannis Flessas, Theodoros Piperos, Alexandra Varlatzidou, Theodoros Troupis, Theodoros Mariolis-Sapsakos
Complete mesocolic excision (CME) is a standardized surgical procedure for colonic cancer that requires ample knowledge of the anatomical patterns of the colic arteries. Variations of the colic vessels encumber both surgical and endovascular techniques. In the presented case below, the right colic artery was incidentally detected emerging from the right gastroepiploic artery, during CME. Surgeons should be always aware of this variation in order to perform safe abdominal surgeries and sufficient resection of the regional lymph nodes with a view to minimizing the probability of recurrence of disease when encountering colonic cancer...
November 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/29213358/intratumoral-treatment-with-radioactive-beta-emitting-microparticles-a-systematic-review
#12
REVIEW
Robbert C Bakker, Marnix G E H Lam, Sebastiaan A van Nimwegen, Antoine J W P Rosenberg, Robert J J van Es, J Frank W Nijsen
Purpose: The purpose of this study was to review the role of radioactive microparticles (1-100 μm) for the treatment of solid tumors and provide a comprehensive overview of the feasibility, safety, and efficacy. Methods: A systematic search was performed in MEDLINE, EMBASE, and The Cochrane Library (January 2017) by combining synonyms for the determinants "tumor," "injection," and "radionuclide." Data on injection technique, toxicity, tumor response, and survival were collected...
2017: Journal of Radiation Oncology
https://www.readbyqxmd.com/read/29212469/orthogonal-p-wave-morphology-is-affected-by-intra-atrial-pressures
#13
Richard Petersson, J Gustav Smith, David A Larsson, Öyvind Reitan, Jonas Carlson, Pyotr Platonov, Fredrik Holmqvist
BACKGROUND: It has previously been shown that the morphology of the P-wave neither depends on atrial size in healthy subjects with physiologically enlarged atria nor on the physiological anatomical variation in transverse orientation of the left atrium. The present study aimed to investigate if different pressures in the left and right atrium are associated with different P-wave morphologies. METHODS: 38 patients with isolated, increased left atrial pressure, 51 patients with isolated, increased right atrial pressure and 76 patients with biatrially increased pressure were studied...
December 6, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29211313/comparative-study-of-lung-and-extrapulmonary-poorly-differentiated-neuroendocrine-carcinomas-a-seer-database-analysis-of-162-983-cases
#14
Arvind Dasari, Kathan Mehta, Lauren A Byers, Halfdan Sorbye, James C Yao
BACKGROUND: Extrapulmonary neuroendocrine carcinomas (NECs) are poorly studied and are managed similar to lung NECs, which may not account for differences between the 2 groups of tumors as well as the heterogeneity within extrapulmonary NEC. METHODS: Data from the Surveillance, Epidemiology, and End Results program between 1973 and 2012 were used to estimate the relative percentages of lung NECs and subgroups of extrapulmonary NECs, epidemiological patterns at these sites, and the median and 5-year overall survival rates...
December 6, 2017: Cancer
https://www.readbyqxmd.com/read/29209990/surgical-anatomy-of-the-right-gastro-omental-artery-a-study-on-100-cadaver-dissections
#15
Nicla Settembre, Marc Labrousse, Pierre Edouard Magnan, Alain Branchereau, Pierre Champsaur, Rossana Bussani, Marc Braun, Sergueï Malikov
PURPOSE: The gastro-omental artery (GOA) with the greater omentum (GO) is known for its high quality as a vascular graft, its resistance to infections as an omental flap and for its multiple applications in surgery. A better knowledge of anatomical variations of GO and its vascularization can improve the application in surgery and decrease complications. The purpose of this study was to measure diameters and lengths of the right GOA (RGOA) and study the interindividual variability of these anatomical structures...
December 5, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29209928/subclavian-and-axillary-vessel-anatomy-a-prospective-observational-ultrasound-study
#16
Catherine Lavallée, Christian Ayoub, Asmaa Mansour, Jean Lambert, Jean-Sébastien Lebon, Manoj M Lalu, André Denault
PURPOSE: The primary objective of this study was to define the ultrasound-derived anatomy of the axillary/subclavian vessels. As a secondary objective, we evaluated the relationship between the vascular anatomy and demographic, anthropometric, and hemodynamic data of patients. METHODS: This observational anatomical study used bedside ultrasound with 150 cardiac surgical patients in the operating room. Bilateral axillary and subclavian anatomy was determined using a high-frequency ultrasound probe with fixed reference points...
December 5, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29207687/variation-in-morphometry-of-vastus-medialis-muscle
#17
Hina B Rajput, Sangeeta J Rajani, Vasant H Vaniya
Introduction: The Vastus Medialis (VM) muscle divides into two parts, proximal Vastus Medialis Longus (VML) and distal Vastus Medialis Obliquus (VMO). The VMO originates from the tendon of adductor magnus and insert into the medial border of patella and these fibers are nearly horizontal. It exerts medial force vector to counter the lateral force vector of Vastus Lateralis (VL) hence the VM presents a biomechanical advantage over the VL. The functional importance of VML and VMO is well explained but the anatomical evidence of separate identity of VMO is lacking...
September 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/29205227/digital-image-correlation-techniques-for-strain-measurement-in-a-variety-of-biomechanical-test-models
#18
Sarah Hensley, Mackenzie Christensen, Scott Small, Derek Archer, Emily Lakes, Renee Rogge
PURPOSE: Previous biomechanical studies have estimated the strains of bone and bone substitutes using strain gages. However, applying strain gages to biological samples can be difficult, and data collection is limited to a small area under the strain gage. The purpose of this study was to compare digital image correlation (DIC) strain measurements to those obtained from strain gages in order to assess the applicability of DIC technology to common biomechanical testing scenarios. METHODS: Compression and bending tests were conducted on aluminum alloy, polyurethane foam, and laminated polyurethane foam specimens...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29204764/variations-in-the-origins-of-the-thyroid-arteries-on-ct-angiography
#19
Kaan Esen, Anil Ozgur, Yuksel Balci, Sermin Tok, Engin Kara
OBJECTIVE: To investigate the anatomical variations in the origins of the thyroid arteries on CT angiography images. METHODS: The presence and the origins of the superior thyroid artery, the inferior thyroid artery, and the thyroidea ima artery were retrospectively evaluated based on carotid CT angiography examinations. The bifurcation level of the common carotid artery with respect to the cervical vertebrae and disc spaces was also determined. A total of 640 patients were included in the study...
December 4, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29203803/brain-structural-bases-of-tendency-to-forgive-evidence-from-a-young-adults-sample-using-voxel-based-morphometry
#20
Haijiang Li, Qunlin Chen, Jiamei Lu, Jiang Qiu
Tendency to forgive refers to one's global dispositional level of forgiveness across situations and relationships. Brain imaging studies examined activation patterns underlying forgiving response, yet focal differences in brain structures related to tendency to forgive have never been investigated. In this study, voxel-based morphometry was used to investigate relations between gray matter/white matter volume (GMV/WMV) and individual differences in tendency to forgive in a large young sample. Participants were 199 young students (60 men) who completed the tendency to forgive scale (TTF) and underwent an anatomical magnetic resonance imaging scan...
December 4, 2017: Scientific Reports
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