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Anatomy variation

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https://www.readbyqxmd.com/read/29769055/one-visceral-artery-may-be-enough-successful-pancreatectomy-in-a-patient-with-total-occlusion-of-the-celiac-and-superior-mesenteric-arteries
#1
Evangelos Tagkalos, Florian Jungmann, Hauke Lang, Stefan Heinrich
BACKGROUND: The anatomic variations of the visceral arteries are not uncommon. The liver arterial blood supply shows 50% variability between humans, with the most common anatomy being one hepatic artery arising from the celiac trunk and one pancreatico-duodenal arcade between the celiac trunk and the superior mesenteric artery. Occlusion of one artery are mostly asymptomatic but may become clinically relevant when surgery of the liver, bile duct or the pancreas is required. If these pathologies are not reversible, an oncologic pancreatic head resection cannot be performed...
May 16, 2018: BMC Surgery
https://www.readbyqxmd.com/read/29768337/variation-in-origin-of-the-long-head-of-the-biceps-brachii-tendon-in-a-cadaver-a-case-report
#2
Shuji Katsuki, Hayato Terayama, Ryuta Tanaka, Ning Qu, Osamu Tanaka, Kanae Umemoto, Kaori Suyama, Kou Sakabe
INTRODUCTION: In general, the long head of the biceps brachii (LHB) tendon arises from the supraglenoid tubercle in the shoulder joint, and it has an important stabilizing mechanism for the humeral head in the shoulder joint. This case demonstrates that even if the LHB tendon can be palpated outside of the shoulder joint, it may disappear in the intertubercular sulcus (IS) and in the glenohumeral (GH) joint because of abnormal articulation. PATIENT CONCERNS: This case involved the cadaver of an 82-year-old Japanese man (number 1936, cause of death: hepatocellular tumor), who was selected from the bodies used for gross anatomy practice at the Tokai University School of Medicine in 2017...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29763970/technical-note-experimental-verification-of-magnetic-field-induced-beam-deflection-and-bragg-peak-displacement-for-mr-integrated-proton-therapy
#3
Sonja M Schellhammer, Sebastian Gantz, Armin Lühr, Bradley M Oborn, Michael Bussmann, Aswin L Hoffmann
PURPOSE: Given its sensitivity to anatomical variations, proton therapy is expected to benefit greatly from integration with magnetic resonance imaging for on-line anatomy monitoring during irradiation. Such an integration raises several challenges, as both systems mutually interact. The proton beam will experience quasi-continuous energy loss and energy-dependent electromagnetic deflection at the same time, giving rise to a deflected beam trajectory and an altered dose distribution with a displaced Bragg peak...
May 15, 2018: Medical Physics
https://www.readbyqxmd.com/read/29762436/preoperative-analysis-of-venous-anatomy-before-deep-inferior-epigastric-perforator-free-flap-breast-reconstruction-using-ferumoxytol-enhanced-magnetic-resonance-angiography
#4
John Dortch, Antonio J Forte, Candice Bolan, Pujan Kandel, Galen Perdikis
BACKGROUND: Venous congestion after deep inferior epigastric artery perforator (DIEP) flap breast reconstruction is a complication that may be partially attributable to variations in venous abdominal wall anatomy. In previous work, we have shown that ferumoxytol may be used as a bloodpool contrast agent to perform high-resolution venous imaging. Our current aim was to use this technology to perform a detailed analysis of the venous anatomy among patients undergoing DIEP flap breast reconstruction...
May 14, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29759935/applied-anatomy-of-round-window-and-adjacent-structures-of-tympanum-related-to-cochlear-implantation
#5
Shraddha Jain, Sagar Gaurkar, Prasad T Deshmukh, Mohnish Khatri, Sanika Kalambe, Pooja Lakhotia, Deepshikha Chandravanshi, Ashish Disawal
INTRODUCTION: Various aspects of the round window anatomy and anatomy of posterior tympanum have relevant implications for designing cochlear implant electrodes and visualizing the round window through facial recess. Preoperative information about possible anatomical variations of the round window and its relationships to the adjacent neurovascular structures can help reduce complications in cochlear implant surgery. OBJECTIVE: The present study was undertaken to assess the common variations in round window anatomy and the relationships to structures of the tympanum that may be relevant for cochlear implant surgery...
April 19, 2018: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/29759708/intra-atrial-right-coronary-artery-and-its-ablation-implications
#6
Balaji Krishnan, Caroline Cross, Richard Dykoski, David G Benditt, Mackenzie Mbai, Edward McFalls, Jian-Ming Li, Stefan Bertog, Venkatakrishna N Tholakanahalli
OBJECTIVES: The study examined the frequency in which a right coronary artery (RCA) anomaly resulting in intra-atrialization of the vessel might increase risk of RCA damage during routine radiofrequency ablation in the right atrium even with low power or temperature. BACKGROUND: Right coronary artery (RCA) injury with endocardial RF ablation of the right atrium is a rare complication. METHODS: This prospective observational study comprised an analysis of coronary artery anatomies in 331 patients who underwent autopsies at our institution from 2005 to 2014...
September 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29757366/a-systematic-review-and-meta-analysis-reveals-pervasive-effects-of-germline-mitochondrial-replacement-on-components-of-health
#7
Ralph Dobler, Damian K Dowling, Edward H Morrow, Klaus Reinhardt
BACKGROUND: Mitochondrial replacement, a form of nuclear transfer, has been proposed as a germline therapy to prevent the transmission of mitochondrial diseases. Mitochondrial replacement therapy has been licensed for clinical application in the UK, and already carried out in other countries, but little is known about negative or unintended effects on the health of offspring born using this technique. OBJECTIVE AND RATIONALE: Studies in invertebrate models have used techniques that achieve mitochondrial replacement to create offspring with novel combinations of mitochondrial and nuclear genotype...
May 11, 2018: Human Reproduction Update
https://www.readbyqxmd.com/read/29756297/retinal-specializations-and-visual-ecology-in-an-animal-with-an-extremely-elaborate-pupil-shape-the-little-skate-leucoraja-raja-erinacea-mitchell-1825
#8
S Terrell Jinson, Jan Liebich, Stephen L Senft, Lydia M Mäthger
Investigating retinal specializations offers insights into eye functionality. Using retinal wholemount techniques, we investigated the distribution of retinal ganglion cells in the Little skate Leucoraja erinacea by (1) dye-backfilling into the optic nerve prior to retinal wholemounting; (2) Nissl-staining of retinal wholemounts. Retinas were examined for regional specializations (higher numbers) of ganglion cells that would indicate higher visual acuity in those areas. Total ganglion cell number were low compared to other elasmobranchs (backfilled: average 49,713 total ganglion cells, average peak cell density 1,315 ganglion cells mm-2 ; Nissl-stained: average 47,791 total ganglion cells, average peak cell density 1,319 ganglion cells mm-2 )...
May 14, 2018: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/29753997/anatomical-variation-of-the-dorsalis-pedis-artery-in-a-south-african-population-a-cadaveric-study
#9
S Ntuli, S Nalla, A Kiter
BACKGROUND: The dorsalis pedis artery is responsible for blood supply to the dorsal aspect of the foot and is vital in the clinical assessment of the arterial supply thereof. Clinical assessment should consider anatomical variations of dorsalis pedis artery. Clearly, a thorough understanding of the potential variations of the vasculature in the area is important for a precise clinical assessment of arterial supply to the foot. The aim of this study was to investigate the different branching patterns of the dorsalis pedis artery that exist in a South African population...
May 10, 2018: Foot
https://www.readbyqxmd.com/read/29744895/leaf-anatomy-does-not-explain-apparent-short-term-responses-of-mesophyll-conductance-to-light-and-co-2-in-tobacco
#10
Marc Carriquí, Cyril Douthe, Arántzazu Molins, Jaume Flexas
Mesophyll conductance to CO2 (gm ), a key photosynthetic trait, is strongly constrained by leaf anatomy. Leaf anatomical parameters such as cell wall thickness and chloroplast area exposed to the mesophyll intercellular airspace have been demonstrated to determine gm in species with diverging phylogeny, leaf structure and ontogeny. However, the potential implication of leaf anatomy, especially chloroplast movement, on the short-term response of gm to rapid changes (i.e. seconds to minutes) under different environmental conditions (CO2 , light or temperature) has not been examined...
May 10, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29741975/introducing-anatomically-correct-ct-guided-laparoscopic-right-colectomy-with-d3-anterior-posterior-extended-mesenterectomy-initial-experience-and-technical-pitfalls
#11
Robin Gaupset, Jens Marius Nesgaard, Airazat M Kazaryan, Bojan V Stimec, Bjørn Edwin, Dejan Ignjatovic
BACKGROUND: Laparoscopic D3 anterior posterior extended mesenterectomy (D3APEM) in right colectomy has received increased attention. The aim of this study is to prove feasibility, systemize technical accomplishment, and provide short-term outcomes data. METHODS: From July 2013 to February 2017, 18 patients with adenocarcinoma in the right colon underwent right colectomy with laparoscopic D3APEM, including lymph nodes anterior and posterior to the superior mesenteric vessels...
May 9, 2018: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/29730702/ultrasound-guided-steroid-injection-for-the-treatment-of-de-quervain-s-disease-an-anatomy-based-approach
#12
Jong-Hyun Bing, Soo-Jung Choi, Seung-Moon Jung, Dae-Shick Ryu, Jae-Hong Ahn, Chae-Hoon Kang, Dong-Rock Shin
OBJECTIVE: To suggest different ultrasound-guided steroid injection (USI) techniques based on anatomical variations of the first extensor compartment (FEC), and to evaluate the usefulness of it, in patients with de Quervain's disease. MATERIALS AND METHODS: Twenty-eight patients who underwent USI for de Quervain's disease were included. Anatomical variations were classified into complete sub-compartmentalization (n = 11), distal incomplete sub-compartmentalization (n = 5), and no sub-compartmentalization (n = 12) on ultrasound...
May 5, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29728742/in-vivo-three-dimensional-mr-imaging-of-the-intact-anterior-cruciate-ligament-shows-a-variable-insertion-pattern-of-the-femoral-and-tibial-footprints
#13
S U Scheffler, K Maschewski, R Becker, P Asbach
PURPOSE: Failure to reconstruct the natural footprints of the ruptured anterior cruciate ligament (ACL) may lead to premature graft-failure. Therefore, precise analyses of insertion site anatomy and inter-individual variations of the morphology of the ACL are highly important to facilitate optimal individualized graft placement. Therefore, the purpose of this study was to analyze the inter-individual variation of the morphology of the femoral and tibial ACL footprints. METHODS: Thirty subjects with an intact ACL were included in this study for MR imaging of their knee joint...
May 4, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29727331/10th-anniversary-of-alpps-lessons-learned-and-quo-vadis
#14
Hauke Lang, Eduardo de Santibañes, Hans J Schlitt, Massimo Malagó, Thomas van Gulik, Marcel A Machado, Elio Jovine, Stefan Heinrich, Giuseppe Maria Ettorre, Albert Chan, Roberto Hernandez-Alejandro, Ricardo Robles Campos, Per Sandström, Michael Linecker, Pierre-Alain Clavien
OBJECTIVE: Associating Liver Partition and Portal vein ligation for Staged hepatectomy (ALPPS) has been tested in various indications and clinical scenarios, leading to steady improvements in safety. This report presents the current status of ALPPS. SUMMARY BACKGROUND DATA: ALPPS offers improved resectability, but drawbacks are regularly pointed out regarding safety and oncologic benefits. METHODS: During the 12th biennial congress of the European African-Hepato-Pancreato-Biliary Association (Mainz, Germany, May 23-26, 2017) an expert meeting "10th anniversary of ALPP" was held to discuss indications, management, mechanisms of regeneration, as well as pitfalls of this novel technique...
May 1, 2018: Annals of Surgery
https://www.readbyqxmd.com/read/29719716/expression-of-meis-and-hoxa11-in-dipnoan-and-teleost-fins-provides-new-insights-into-the-evolution-of-vertebrate-appendages
#15
Fernanda Langellotto, Maria Fiorentino, Elena De Felice, Luigi Caputi, Valeria Nittoli, Jean M P Joss, Paolo Sordino
Background: The concerted activity of Meis and Hoxa11 transcription factors is essential for the subdivision of tetrapod limbs into proximo-distal (PD) domains; however, little is know about the evolution of this patterning mechanism. Here, we aim to study the expression of meis and hoxa11 orthologues in the median and paired rayed fins of zebrafish and in the lobed fins of the Australian lungfish. Results: First, a late phase of expression of meis1.1 and hoxa11b in zebrafish dorsal and anal fins relates with segmentation of endochondral elements in proximal and distal radials...
2018: EvoDevo
https://www.readbyqxmd.com/read/29718230/planning-for-minimally-invasive-aortic-valve-replacement-key-steps-for-patient-assessment
#16
Patrick Klein, Idserd D G Klop, Geoffrey L T Kloppenburg, Bart P van Putte
Minimally invasive aortic valve replacement (MIAVR) has proved to be a safe approach for the treatment of aortic valve stenosis and/or insufficiency and is associated with a number of additional benefits for patients. This includes reduced blood loss, reduced transfusion requirements, reduced length of hospital stay and improved aesthetic appearance. As all types of minimally invasive surgery rely on optimizing exposure within a more limited field of view, a thorough preoperative assessment of patients is important to identify and address potential exposure problems...
May 1, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29713738/fetal-median-sacral-artery-anatomy-study-by-micro-ct-imaging
#17
P Meignan, A Binet, A R Cook, H Lardy, G Captier
PURPOSE: The median sacral artery (MSA) is the termination of the dorsal aorta, which undergoes a complex regression and remodeling process during embryo and fetal development. The MSA contributes to the pelvic vascularization and may be injured during pelvic surgery. The embryological steps of MSA development, anastomosis formation and anatomical variations are linked, but not fully understood. METHODS: The pelvic vascularization and more precisely the MSA of a human fetus at 22 weeks of gestation (GW) were studied using micro-CT imaging...
April 30, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29710844/synthesis-and-characterization-of-injectable-hydrogels-with-varying-collagen%C3%A2-chitosan%C3%A2-thymosin-%C3%AE-4-composition-for-myocardial-infarction-therapy
#18
Achmad Dzihan Shaghiera, Prihartini Widiyanti, Helmy Yusuf
Thirty percent of global mortalities are caused by cardiovascular disease, and 54% of the aforementioned amount is instigated by ischemic heart disease that triggered myocardial infarction. Myocardial infarction is due to blood flow cessation in certain coronary arteries that causes lack of oxygen (ischemia) and stimulates myocardial necrosis. One of the methods to treat myocardial infarction consists in injecting cells or active biomolecules and biomaterials into heart infarction locations. This study aimed to investigate the characteristics of a collagen⁻chitosan-based hydrogel with variations in its chitosan composition...
April 30, 2018: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/29709371/neuroendoscopic-septostomy-indications-and-surgical-technique
#19
L Giammattei, V Aureli, R-T Daniel, M Messerer
BACKGROUND: Endoscopic septostomy is the treatment of choice for monolateral obstruction of the foramen of Monro. Common causes of this condition include: neoplasms, hemorrages, infections, congenital atresia, idiopathic occlusion. METHOD: All the steps for performing a safe endoscopic pellucidotomy are presented. A brief discussion about the most common technical variations and their rationale is added. CONCLUSION: Endoscopic pellucidotomy is a safe and effective treatment when a thorough understanding of anatomy is achieved...
April 27, 2018: Neuro-Chirurgie
https://www.readbyqxmd.com/read/29702024/video-preoperative-ct-angiography-for-fibular-free-flap-reconstructions
#20
Bilal Mujtaba, Gaurav K Synghal, Patrick B Garvey, Behrang Amini, Tamara Miner Haygood, John E Madewell, Colleen M Costelloe
OBJECTIVE: The objective of this video article is to provide an introduction to the use of fibular free flaps. Normal and variant vascular anatomy of the fibular free flap is discussed, as are imaging acquisition and CT angiography interpretation, computer-assisted design and manufacturing, and the limitations of the fibular free flap. CONCLUSION: The fibular free flap is commonly used for head and neck reconstructive surgery. Variation exists between individuals regarding the origin of the peroneal artery and the perforating arteries...
April 27, 2018: AJR. American Journal of Roentgenology
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