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Obesity Surgery

Ausgabe 6/2021

Inhalt (74 Artikel)

Original Contributions

Sleeve Gastrectomy Versus Roux-en-Y Gastric Bypass in the Elderly: 1-Year Preliminary Outcomes in a Randomized Trial (BASE Trial)

Denis Pajecki, Anna Carolina Batista Dantas, Francisco Tustumi, Ana Lumi Kanaji, Roberto de Cleva, Marco Aurelio Santo

Original Contributions

Laparoscopic Sleeve Gastrectomy Following Failed Laparoscopic Adjustable Gastric Banding—a Comparison Between One- and two-Stage Procedures, an Israeli National Database Study

Zvi Perry, Orly Romano-Zelekha, Nasser Sakran, Itzhak Avital, Shahar Atias, Uri Netz, Boris Kirshtein

Open Access Original Contributions

Long-term Emergency Department Visits and Readmissions After Laparoscopic Roux-en-Y Gastric Bypass: a Systematic Review

N. van Olst, A. S. van Rijswijk, S. Mikdad, L. J. Schoonmade, A. W. van de Laar, Y. I. Z. Acherman, S. C. Bruin, D. L. van der Peet, L. M. de Brauw

Open Access Original Contributions

Bariatric-Metabolic Surgery Utilisation in Patients With and Without Diabetes: Data from the IFSO Global Registry 2015–2018

Richard Welbourn, Marianne Hollyman, Robin Kinsman, John Dixon, Ricardo Cohen, John Morton, Amir Ghaferi, Kelvin Higa, Johan Ottosson, Francois Pattou, Salman Al-Sabah, Merhan Anvari, Jacques Himpens, Ronald Liem, Villy Våge, Peter Walton, Wendy Brown, Lilian Kow

Original Contributions

Metabolic Surgery and Class 1 Obesity (< 35 kg/m2): a Prospective Study with Short-, Mid-, and Long-term Results Among Latinos

Luis Cevallos, Fátima M. Rodríguez, Antonio Herrera, Elisa M. Sepúlveda, Gianluca Donatini, Lizbeth Guilbert, Carlos Zerrweck

Original Contributions

Early Effects of Laparoscopic Sleeve Gastrectomy and Laparoscopic One-Anastomosis Gastric Bypass on Portal Venous Flow: a Prospective Cohort Study

Ayman M. A. Osman, Ayman S. Helmy, Sameh Mikhail, Ayman A. AlAyat, Dalia K. Serour, Mohamed Y. Ibrahim

Original Contributions

Impact of Bariatric Surgery on Endometrial Cancer Tumor Pathology

David A. Mahvi, Olivia W. Foley, Ali Ardestani, Ali Tavakkoli, Eric G. Sheu

Original Contributions

Effect of Preoperative Weight Loss and Baseline Comorbidity on Short-Term Complications and Reoperations After Laparoscopic Roux-en-Y Gastric Bypass in 2,067 Patients

Tom Wiggins, Dimitri J. Pournaras, Elena Priestman, Alan Osborne, Daniel R. Titcomb, Ian Finlay, James Hopkins, Marianne Hollyman, Matthew Mason, Hamish Noble, David Mahon, Richard Welbourn

Original Contributions

Areas of Non-Consensus Around One Anastomosis/Mini Gastric Bypass (OAGB/MGB): A Narrative Review

Mohammad Kermansaravi, Amir Hossein DavarpanahJazi, Shahab ShahabiShahmiri, Miguel Carbajo, Antonio Vitiello, Chetan D. Parmar, Mario Musella

Original Contributions

Comparative Effectiveness of Roux-en-Y Gastric Bypass vs. One Anastomosis Gastric Bypass on Kidney Function

Mohsen Mahmoudieh, Behrouz Keleidari, Pedram Hadipour, Erfan Sheikhbahaei, Alex R. Chang, Sina Ramtin, Shahab Shahabi

Original Contributions

Test Characteristics of Abdominal Computed Tomography for the Diagnosis of Gastro-gastric Fistula in Patients with Roux-en-Y Gastric Bypass

Russell D. Dolan, Ahmad Najdat Bazarbashi, Pichamol Jirapinyo, Christopher C. Thompson

Zur Zeit gratis COVID-19 Original Contribution

Effects of Bariatric Surgery on COVID-19: a Multicentric Study from a High Incidence Area

Federico Marchesi, Marina Valente, Matteo Riccò, Matteo Rottoli, Edoardo Baldini, Fouzia Mecheri, Stefano Bonilauri, Sergio Boschi, Paolo Bernante, Andrea Sciannamea, Jessica Rolla, Alice Francescato, Ruggero Bollino, Concetto Cartelli, Andrea Lanaia, Francesca Anzolin, Paolo Del Rio, Diletta Fabbi, Gabriele Luciano Petracca, Francesco Tartamella, Giorgio Dalmonte

Open Access Original Contributions

Predictors of Postprandial Hypoglycemia After Gastric Bypass Surgery: a Retrospective Case-Control Study

Elric Zweck, Matthias Hepprich, Marc Y. Donath

Original Contributions

Effects of Post-operative Nutritional Disorders Following Bariatric Surgery on Health Care Cost and Use

Jaewhan Kim, Norman Waitzman, Steven Simper, Rodrick McKinlay, Daniel Cottam, Amit Surve, Nathan Richards, Ted Adams

Open Access Original Contributions

Endoscopic Negative Pressure Therapy (ENPT) Is Superior to Stent Therapy for Staple Line Leak After Sleeve Gastrectomy: a Single-Center Cohort Study

Rami Archid, Fateh Bazerbachi, Barham K. Abu Dayyeh, Felix Hönes, Suhaib J. S. Ahmad, Karolin Thiel, Giorgi Nadiradze, Alfred Königsrainer, Dörte Wichmann

Open Access Original Contributions

Optimizing Multivitamin Supplementation for Sleeve Gastrectomy Patients

Laura Heusschen, Agnes A. M. Berendsen, Mellody I. Cooiman, Laura N. Deden, Eric J. Hazebroek, Edo O. Aarts

Original Contributions

The Effect of Participation in Tier 3 Services on the Uptake of Bariatric Surgery

Chanpreet Arhi, Chrysanthi Karagianni, Louise Howse, Midhat Siddiqui, Cynthia-Michelle Borg

Open Access Original Contributions

Internal Hernia After One Anastomosis Gastric Bypass (OAGB): Lessons Learned from a Retrospective Series of 3368 Consecutive Patients Undergoing OAGB with a Biliopancreatic Limb of 150 cm

Niccolo Petrucciani, Francesco Martini, Radwan Kassir, Gildas Juglard, Celine Hamid, Hubert Boudrie, Olivier Van Haverbeke, Arnaud Liagre

Open Access Original Contributions

Decrease of dipeptidyl peptidase 4 activity is associated with weight loss after bariatric surgery

Carsten T. Herz, Johanna M. Brix, Bernhard Ludvik, Guntram Schernthaner, Gerit-Holger Schernthaner

Original Contributions

Analysis of the ‘Evaluation Indicators’ of an Enhanced Recovery After Bariatric Surgery Pathway in the First Six Months After Implementation

Ana M. Gimeno-Moro, Carlos L. Errando, Vicente J. Escrig-Sos, José M. Laguna-Sastre

Original Contributions

Impact of Baseline BMI and Adherence to Follow-Up on the Outcome of Sleeve Gastrectomy in Treatment of Adolescent Obesity

Marwan Rasheed Mohammed, Tarek Mahdy, Anas Hashem, Sabah Zaki, Abdulwahid Alwahedi, Hayder Makki, Yaser Asaad, Sameh Hany Emile

Original Contributions

Ramadan Fasting Increases Socialization in Patients Who Underwent Sleeve Gastrectomy: An Observational Study

E. Daldal, H. Dagmura, F. Dasiran, I. Okan, E. Bulbuloglu

Original Contributions

Role of Robotic Surgery in Complex Revisional Bariatric Procedures

Yilon Lima Cheng, Enrique F. Elli

Original Contributions

Bariatric Surgery on Reproductive Outcomes: the Impact According to the Diagnosis of Polycystic Ovarian Syndrome and Surgical Procedures

Gemma Casals, Alba Andreu, Yasmina Barral, Sara Ventosa, Miriam Redondo, Ferran Torres, Ainitze Ibarzábal, Dolors Manau, Francisco Carmona, Josep Vidal, Lilliam Flores

Original Contributions

The Impact of Gastric Bypass on Telomere Length and Shelterin Complex Gene Expression: 6 Months Prospective Study

Caroline Rossi Welendorf, Carolina Ferreira Nicoletti, Natália Yumi Noronha, Flávia Campos Ferreira, Letícia Santana Wolf, Marcela Augusta de Souza Pinhel, Vitor Caressato Pinhanelli, Cristiana Cortes de Oliveira, Bruno Affonso Parenti de Oliveira, Luzania dos Santos Martins, Wilson Salgado Junior, Carla Barbosa Nonino

Open Access Original Contributions

Preoperative Cardiac Diagnostics in Bariatric Patients with Diabetes and Perioperative Morbidity: Results of a Cohort of 258 Patients

Benjamin Stillhard, B. T. Truc Ngo, Ralph Peterli, Thomas Peters, Romano Schneider, Marko Kraljević, Marc Slawik, Bettina Wölnerhanssen

Zur Zeit gratis COVID-19 Original Contributions

Impact of COVID-19 Lockdown on Short-Term Results After Laparoscopic Sleeve Gastrectomy

Imad El Moussaoui, Julie Navez, Kamal El Moussaoui, Marie Barea-Fernandez, Anne Schaeken, Jean Closset

Original Contributions

Changes in Anthropometric Measures, Nutritional Indices and Gastrointestinal Symptoms Following One Anastomosis Gastric Bypass (OAGB) Compared with Roux-en-y Gastric Bypass (RYGB)

Nazy Zarshenas, Linda Clare Tapsell, Marijka Batterham, Elizabeth Phillipa Neale, Michael Leonard Talbot

Original Contributions

Gastrointestinal pH, Motility Patterns, and Transit Times After Roux-en-Y Gastric Bypass

Louise Ladebo, Pernille V. Pedersen, Grzegorz J. Pacyk, Jens Peter Kroustrup, Asbjørn M. Drewes, Christina Brock, Anne E. Olesen

Original Contributions

Decision Tree for the Performance of Intraoperative Liver Biopsy During Bariatric Surgery

Sandrine Barbois, N. Stürm, J. Aron-Wisnewsky, K. Clément, P. Bedossa, Laurent Genser, M. N. Hilleret, C. Costentin, F. Reche, C. Arvieux, A. L. Borel

Open Access Original Contributions

Hair Loss After Metabolic and Bariatric Surgery: a Systematic Review and Meta-analysis

Wen Zhang, Meiling Fan, Cunchuan Wang, Kamal Mahawar, Chetan Parmar, Weiju Chen, Wah Yang

Original Contribution

Preoperative Nutritional Deficiencies in Bariatric Surgery Candidates in Korea

Bo Chuan Tan, Young Suk Park, Yongjoon Won, Sangjun Lee, So Hyun Kang, Sang-Hoon Ahn, Do Joong Park, Hyung-Ho Kim

Original Contributions

Executive Functioning in Extreme Obesity: Contributions from Metabolic Status, Medical Comorbidities, and Psychiatric Factors

Kyler Mulhauser, Evan L. Reynolds, Brian C. Callaghan, Cassandra Fierro, Bruno Giordani, Kristen Votruba

Original Contributions

Propensity Score–Matching Sleeve Gastrectomy (SG) vs. Gastric Bypass (RYGB) in Patients ≥ 60 Years

Omar Thaher, Stefanie Wolf, Martin Hukauf, Christine Stroh

Open Access Original Contributions

Efficacy and Drawbacks of Single-Anastomosis Duodeno-Ileal Bypass After Sleeve Gastrectomy in a Tertiary Referral Bariatric Center

Arnaud Liagre, Francesco Martini, Yves Anduze, Hubert Boudrie, Olivier Van Haverbeke, Stefano Valabrega, Radwan Kassir, Tarek Debs, Niccolò Petrucciani

Original Contributions

Sociodemographic Factors Associated with Loss to Follow-Up After Bariatric Surgery

Ines Barka, Perle Sayedoff, Nathalie Garnier, Camille Cussac-Pillegand, Christophe Barrat, Hélène Bihan

Open Access Original Contributions

Laparoscopic Sleeve Gastrectomy with Omentopexy: Is It Really a Promising Method?—A Systematic Review with Meta-analysis

Piotr Zarzycki, Jan Kulawik, Piotr Małczak, Mateusz Rubinkiewicz, Mateusz Wierdak, Piotr Major

Original Contributions

Laparoscopic Roux-en-Y Gastric Bypass After Failed Vertical Banded Gastroplasty: 2-Year Follow-up of 102 Patients

Mohamed D. Sarhan, M. AbdelSalam N., Mohamed Saber Mostafa, AbdelRahman Yehia, Ismail Anwar, Ehab Fathy

Original Contributions

Vitamin D in the Preoperative and Postoperative Periods of Bariatric Surgery

Eryka M. dos Santos, Denise S. C. de Lima, Bruna M. Padilha, Poliana C. Cabral, Luciana C. P. do Nascimento, Pedro H. F. Feitosa, Álvaro A. B. Ferraz

Original Contributions

Analysis of National Bariatric Surgery Related Clinical Incidents: Lessons Learned and a Proposed Safety Checklist for Bariatric Surgery

Islam Omar, Brijesh Madhok, Chetan Parmar, Omar Khan, Michael Wilson, Kamal Mahawar

Review

Adverse Events and Complications with Intragastric Balloons: a Narrative Review (with Video)

Igor Braga Ribeiro, Ana Paula Samy Tanaka Kotinda, Sergio A. Sánchez-Luna, Diogo Turiani Hourneaux de Moura, Fabio Catache Mancini, Thiago Ferreira de Souza, Sergio Eiji Matuguma, Christiano Makoto Sakai, Rodrigo Silva de Paula Rocha, Gustavo de Oliveira Luz, Marcos Eduardo Lera dos Santos, Dalton Marques Chaves, Tomazo Antonio Prince Franzini, Eduardo Turiani Hourneaux de Moura, Eduardo Guimarães Hourneaux de Moura

Review

Splenic Abscess Following Sleeve Gastrectomy: A Systematic Review of Clinical Presentation and Management Methods

Nasser Sakran, Roxanna Zakeri, Brijesh Madhok, Yitka Graham, Chetan Parmar, Kamal Mahawar, Chanpreet Arhi, Kamran Shah, Sjaak Pouwels

Review

Gastric Bypass Compared with Sleeve Gastrectomy for Nonalcoholic Fatty Liver Disease: a Systematic Review and Meta-analysis

Miller Barreto de Brito e Silva, Francisco Tustumi, Antonio Afonso de Miranda Neto, Anna Carolina Batista Dantas, Marco Aurélio Santo, Ivan Cecconello

Letter to the Editor

Comment on: Relevance of Posterior Gastric Vessel in Bariatric Surgery

Tarun Mittal, Anmol Ahuja, Ashish Dey, Vinod K Malik, Mohammad Taha Mustafa Sheikh

Open Access Letter to the Editor

A Protocol for Rehabilitating the Bypassed Limb Prior to Reversal of Jejunoileal Bypass

Sara Santini, Michel Suter, Maude Martinho-Grueber, Carole Monney Chaubert, Mohammed Barigou, Lucie Favre, Peter Kopp, Anne Kouadio

Zur Zeit gratis COVID-19 Letter to the Editor

Metabolic/Bariatric Surgery during COVID-19

Henry Buchwald

Letter to the Editor

Metabolic Outcomes of Percutaneous Transcathether Bariatric Embolotherapy: Insights from an RCT

Martin Fried, Nodar Kipshidze, Petra Sramkrova, Robert Rosen, Petr Neuzil, Nicholas Kipshidze, Vivek Reddy

Open Access Letter to the Editor

Immediate Euglycemic Diabetic Ketoacidosis After Gastric Bypass in a Patient with Type II Diabetes

Yu-Ting Lo, Kai-Hua Chen, Po-Chih Chang

Letter to the Editor

Dignity and Respect: People-First Language with Regard to Obesity

Simar Singh Bajaj, Fatima Cody Stanford

Letter to the Editor

Pregnancy After Bariatric Surgery: a Matter of Indications and Procedures?

Antonio Vitiello, Giovanna Berardi, Nunzio Velotti, Mario Musella

Letter to Editor/LED Reply

Reply to: Pregnancy After Bariatric Surgery: a Matter of Indications and Procedures?

Laura Heusschen, Ineke Krabbendam, Eric J. Hazebroek

Letter to the Editor

Gastric Cancer After Laparoscopic Sleeve Gastrectomy: a Case Report and Literature Review

Matías Orellana, Pedro Soto, Alejandro Brañes, Fernando Pimentel, Rodrigo Muñoz

Brief Communication

Thromboembolism and Fluid Collections Years Following Gastric Bypass: the Relevance of the Remnant

Kevin D. Platt, Oliver A. Varban, Jonathan F. Finks, Allison R. Schulman

Correction

Correction to: Thromboembolism and Fluid Collections Years Following Gastric Bypass: the Relevance of the Remnant

Kevin D. Platt, Oliver A. Varban, Jonathan F. Finks, Allison R. Schulman

Brief Communication

C Peptide Fails to Improve the Utility of the DiaRem Algorithm in Predicting Remission of Type II Diabetes After Bariatric Surgery

Richard L. Seip, Tara McLaughlin, Madison O’Brien, Ilene Staff, Aashish Samat, Devika Umashanker, Darren Tishler, Pavlos K. Papasavas

Brief Communication

DSM 5 Lifetime Psychiatric Diagnoses in Two Bariatric Surgery Programs

Leslie J. Heinberg, James E. Mitchell, Christine Peat, Kristine Steffen

Open Access Brief Communication

Malnutrition and Alcohol in Patients Presenting with Severe Complications of Cirrhosis After Laparoscopic Bariatric Surgery

Yuly P. Mendoza, Chiara Becchetti, Tao Wan, Philipp Nett, Susana G. Rodrigues, Jean-François Dufour, Annalisa Berzigotti

Brief Communication

Impact of Bariatric Surgery on Medication Efficacy: an Analysis of World Health Organization Pharmacovigilance Data

Alicia Guigui, Cécile Bétry, Charles Khouri, Anne-Laure Borel

Zur Zeit gratis COVID-19 Brief Communication

Roux-en-Y Gastric Bypass Downregulates Angiotensin-Converting Enzyme 2 (ACE2) Gene Expression in Subcutaneous White Adipose Tissue: A Putative Protective Mechanism Against Severe COVID-19

Leonardo Kristem, Mariana Recamonde-Mendoza, Giuliano C. Cigerza, Jad Khoraki, Guilherme M. Campos, Guilherme S. Mazzini

Multimedia Article

Inclusion of Orogastric Tube in the Staple Line During Laparoscopic Roux-en-Y Gastric Bypass: an Avoidable Complication

Sandeep Jain, Aditya Baksi, Amardeep Kumar, Sandeep Aggarwal

Multimedia Article

Sleeve to Colon Fistula: Laparoscopic Conversion to Roux-en-Y Gastric Bypass

Joseph N. Badaoui, Todd A. Kellogg, Barham Abu Dayyeh, Omar M. Ghanem

Multimedia Article

Internal Hernia After Laparoscopic One-Anastomosis (Mini) Gastric Bypass: Video Case Series of a Single-Center Experience

Alwahhaj Khogeer, Andrei Ilczyszyn, Marco Adamo, Mohamed Elkalaawy

Multimedia Article

Missing Jejunal Perforation During Small Bowel Measurement in Patient Operated by Laparoscopic One-Anastomosis Gastric Bypass

Manuel Ferrer-Márquez, Vanesa Maturana Ibáñez, Francisco Rubio Gil, María José Solvas Salmerón, Maria José Torrente Sánchez, Antonio Martínez.Amo-Gámez, Manuel Ferrer-Ayza

Multimedia Article

Laparoscopic Conversion of Sleeve Gastrectomy to One Anastomosis Gastric Bypass in a Hostile Abdomen

Spyridon Kapoulas, Mohamed Sahloul, Rishi Singhal

Correction

Correction to: Body fat Indices as Effective Predictors of Insulin Resistance in Obstructive Sleep Apnea: Evidence From a Cross-Sectional and Longitudinal Study

Ruobing Wei, Zhenfei Gao, Huajun Xu, Cuiping Jiang, Xinyi Li, Yupu Liu, Jianyin Zou, Huaming Zhu, Hongliang Yi, Jian Guan, Shankai Yin

Correction

Correction to: One Anastomosis Gastric Bypass with a Biliopancreatic Limb of 150 cm: Weight Loss, Nutritional Outcomes, Endoscopic Results, and Quality of Life at 8-Year Follow-Up

Arnaud Liagre, Tarek Debs, Radwan Kassir, Alain Ledit, Gildas Juglard, Mael Chalret du Rieu, Andrea Lazzati, Francesco Martini, Niccolo Petrucciani

Wie erfolgreich ist eine Re-Ablation nach Rezidiv?

23.04.2024 Ablationstherapie Nachrichten

Nach der Katheterablation von Vorhofflimmern kommt es bei etwa einem Drittel der Patienten zu Rezidiven, meist binnen eines Jahres. Wie sich spätere Rückfälle auf die Erfolgschancen einer erneuten Ablation auswirken, haben Schweizer Kardiologen erforscht.

Hinter dieser Appendizitis steckte ein Erreger

23.04.2024 Appendizitis Nachrichten

Schmerzen im Unterbauch, aber sonst nicht viel, was auf eine Appendizitis hindeutete: Ein junger Mann hatte Glück, dass trotzdem eine Laparoskopie mit Appendektomie durchgeführt und der Wurmfortsatz histologisch untersucht wurde.

Mehr Schaden als Nutzen durch präoperatives Aussetzen von GLP-1-Agonisten?

23.04.2024 Operationsvorbereitung Nachrichten

Derzeit wird empfohlen, eine Therapie mit GLP-1-Rezeptoragonisten präoperativ zu unterbrechen. Eine neue Studie nährt jedoch Zweifel an der Notwendigkeit der Maßnahme.

Ureterstriktur: Innovative OP-Technik bewährt sich

19.04.2024 EAU 2024 Kongressbericht

Die Ureterstriktur ist eine relativ seltene Komplikation, trotzdem bedarf sie einer differenzierten Versorgung. In komplexen Fällen wird dies durch die roboterassistierte OP-Technik gewährleistet. Erste Resultate ermutigen.

Update Chirurgie

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S3-Leitlinie „Diagnostik und Therapie des Karpaltunnelsyndroms“

Karpaltunnelsyndrom BDC Leitlinien Webinare
CME: 2 Punkte

Das Karpaltunnelsyndrom ist die häufigste Kompressionsneuropathie peripherer Nerven. Obwohl die Anamnese mit dem nächtlichen Einschlafen der Hand (Brachialgia parästhetica nocturna) sehr typisch ist, ist eine klinisch-neurologische Untersuchung und Elektroneurografie in manchen Fällen auch eine Neurosonografie erforderlich. Im Anfangsstadium sind konservative Maßnahmen (Handgelenksschiene, Ergotherapie) empfehlenswert. Bei nicht Ansprechen der konservativen Therapie oder Auftreten von neurologischen Ausfällen ist eine Dekompression des N. medianus am Karpaltunnel indiziert.

Prof. Dr. med. Gregor Antoniadis
Berufsverband der Deutschen Chirurgie e.V.

S2e-Leitlinie „Distale Radiusfraktur“

Radiusfraktur BDC Leitlinien Webinare
CME: 2 Punkte

Das Webinar beschäftigt sich mit Fragen und Antworten zu Diagnostik und Klassifikation sowie Möglichkeiten des Ausschlusses von Zusatzverletzungen. Die Referenten erläutern, welche Frakturen konservativ behandelt werden können und wie. Das Webinar beantwortet die Frage nach aktuellen operativen Therapiekonzepten: Welcher Zugang, welches Osteosynthesematerial? Auf was muss bei der Nachbehandlung der distalen Radiusfraktur geachtet werden?

PD Dr. med. Oliver Pieske
Dr. med. Benjamin Meyknecht
Berufsverband der Deutschen Chirurgie e.V.

S1-Leitlinie „Empfehlungen zur Therapie der akuten Appendizitis bei Erwachsenen“

Appendizitis BDC Leitlinien Webinare
CME: 2 Punkte

Inhalte des Webinars zur S1-Leitlinie „Empfehlungen zur Therapie der akuten Appendizitis bei Erwachsenen“ sind die Darstellung des Projektes und des Erstellungswegs zur S1-Leitlinie, die Erläuterung der klinischen Relevanz der Klassifikation EAES 2015, die wissenschaftliche Begründung der wichtigsten Empfehlungen und die Darstellung stadiengerechter Therapieoptionen.

Dr. med. Mihailo Andric
Berufsverband der Deutschen Chirurgie e.V.