Nicolás Avellaneda

ORCID: 0000-0002-6802-7125
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About
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Research Areas
  • Colorectal Cancer Surgical Treatments
  • Inflammatory Bowel Disease
  • Diverticular Disease and Complications
  • Microscopic Colitis
  • Colorectal and Anal Carcinomas
  • Colorectal Cancer Screening and Detection
  • Cardiac, Anesthesia and Surgical Outcomes
  • Anorectal Disease Treatments and Outcomes
  • Gastric Cancer Management and Outcomes
  • Intraperitoneal and Appendiceal Malignancies
  • Autoimmune and Inflammatory Disorders
  • Gastrointestinal disorders and treatments
  • Diversity and Career in Medicine
  • Hernia repair and management
  • Pelvic floor disorders treatments
  • Indigenous Cultures and History
  • Stoma care and complications
  • COVID-19 and healthcare impacts
  • Shoulder Injury and Treatment
  • Global Health and Surgery
  • Intestinal and Peritoneal Adhesions
  • Ultrasound in Clinical Applications
  • Genetic factors in colorectal cancer
  • Cultural and Social Studies in Latin America
  • Hospital Admissions and Outcomes

Centro de Educación Médica e Investigaciones Clínicas Norberto Quirno
2017-2024

Aarhus University Hospital
2022-2024

Délégation Paris 6
2022-2024

Hochschule Düsseldorf University of Applied Sciences
2022-2024

Kuwait Petroleum Corporation (Kuwait)
2022-2024

The Bronx Defenders
2023-2024

Hospital Universitario Austral
2017-2023

University of Birmingham
2023

ESCP Business School
2023

NIHR Birmingham Biomedical Research Centre
2023

Stefanie Croghan Helen Mohan Kieran J. Breen Ruth McGovern Kathleen Bennett and 95 more Michael R. Boland Muhammed Elhadi Jessie A. Elliott Anna Fullard Peter E. Lonergan Frank McDermott Asif Mehraj Francesco Pata David M. Quinlan D. C. Winter Jarlath Bolger Christina Fleming Pablo Farinelli María Alday Nicolás Avellaneda María Goya Gastón Clemente Juan Cruz Lopez David Proud Natassia Shulman Dora Huang Wael Jamel Sonia Gill Thomas Arthur Daisy Swindon Amy Frank Roy Teng Irene Chua Nicole Chong Amy Hannigan Madhu Srinivasan Aysha Al Bastaki Sharifa Ahmad Isam Juma Wah Yang Huaxi Wang Shuwen Jiang Eddy P Lincango Naranjo Carla M Dominguez Luis F Huilca José Ricardo Negrete Ocampo Ahmed Nafea Selmy Awad Merihan A. Elbadawy Aya Abdulilah Abdulmonem Mahmoud Shaban Abdelgalil Salma Tarek Helmy Sally Ahmed Abd El-razik Laila Raafat Mabrouk Ahmed Hassan A. Rady Ahmed Shaheen Moataz Ewedah Marina Farag Yousef Tanas Yomna E. Dean Maha Ghanem Fouzia Amir Ahmed M. Ghatwary Menan A. Elsadek Aalaa Saad Ramy A. Hassan Mohamed Omar Herdan Mahmoud A. Nassar S Alaa Areej A. Khamis Hadeer M.S. Youssef Mohamed A. El Sherpiny Eslam Shehata Sandy A. Taha Ahmed A.A.A Zahran Mohamed Al-Nagdy Somaya Z.E Sayed Hafez Shymaa M. Abo Ghanima Sherif Farahat Fatma M. Morgan Shaimaa Mahfouz Hossam Elfeki Hosam Elghadban Mostafa Shalaby Mohamed Shetiwy Mohamed Mostafa Ahmad Sakr Ahmed S. Elsayed Kareem Sadek Maher Eldeghedi Nader Mohamed Reem Elsaadany Yousef Hesham Omar Attiya Abdelrahman Shaaban Yara Sakr Mohammed Alharazin Mohammed A. Omar Marwa N. Alansary Mahmoud Ahmed Ebada

Importance Postoperative urinary retention (POUR) is a well-recognized complication of inguinal hernia repair (IHR). A variable incidence POUR has previously been reported in this context, and contradictory evidence surrounds potential risk factors. Objective To ascertain the of, explore factors for, determine health service outcomes following elective IHR. Design, Setting, Participants The Retention Urine After Inguinal Hernia Elective Repair (RETAINER I) study, an international,...

10.1001/jamasurg.2023.2137 article EN JAMA Surgery 2023-07-05

Studies regarding the epidemiology of systemic lupus erythematosus (SLE) are lacking in Argentina. Our purpose was to estimate incidence and prevalence SLE a university hospital-based health management organisation Buenos Aires (HIMCP).For calculation, population at risk included all adult members HIMCP, with continuous affiliation for least 1 year from January 1998 2009. Each person followed until he/she voluntarily left death or finalisation study. Multiple methods case finding were used...

10.1136/lupus-2014-000021 article EN cc-by-nc Lupus Science & Medicine 2014-05-01

An estimated 2.5-3 million individuals (0.4%) in Europe are affected by inflammatory bowel disease (IBD). Whilst incidence rates for IBD stabilising across Europe, the prevalence is rising and subsequently resulting a significant cost to healthcare system of an 4.6-5.6 billion euros per year. Hospitalisation surgical resection generally on downward trend, which contrary novel medication. This signifies large part burden. Despite publicly funded systems most European countries, there still...

10.1177/17562848231218615 article EN cc-by-nc Therapeutic Advances in Gastroenterology 2023-01-01
Mauro Podda Marcello Di Martino Francesco Pata Giuseppe Nigri Adolfo Pisanu and 95 more Salomone Di Saverio Gianluca Pellino Benedetto Ielpo Ashenafi Negash Tolla Mohamed Abdelkhalek Sameh Hany Emile Tesfaye Aga Dinagde C. Bouzid Ahmed Mohammed Farid Mahmoud Mansour İbrahim Umar Garzali Alazar Berhe Aregawi Tarek Zaghloul Ali Kchaou Selmy Awad Amine Souadka Tedla Gebretsadik Ted Mohammad Saad Saumtally Selmy Awad Bensaad Ahmed Nebiyou Simegnew Bayileyegn Marco Nunziante Mostafa Shalaby Dawit Gebregiorgis Debena Alemayehu Shanko Zena Olayinka Lukman Adewunmi Tolera A. Negasa M. Bourguiba Nura Feituri Kirubel Abebe Kebede Hossam Elfeki Abdelhmed Anas Selmy Awad Nebiyou Ermias Dagnachew Hailemariam Gosa Bejiga Ruhama Yoseph Imana Abebe Taffese Tsega Terefe Feleke Hosam Elghadban Bizuneh Sime Debela Desta Shiferaw Robel Tadesse Isaac Sunday Chukwu Abdullahi Ibrahim Mohammed Khalid Arebo Hassen Ndubuisi K. Obiagwu Tadesse H. Tense Mulugeta Taeme Ewnte Biniam Goytom Knfe Ayenachew Getachew Tegegn Tewodros Abule Bilata Teddy Bekana L. Bekana Melkamu Kibret Nidaw Mahmoud Ibrahim Ali Kebebe Bekele Gonfa Samuel Kiros Tatek Belay Gebeyaw Mengist Yallew Chekol Wassie Alem Mekete Ayalew Fitsum Terefe Asfaw Aimal Khan Aimal María A. Casas Fausto Madrid José Antonio Díaz Elizondo Ignacio Merlo Tércio De Campos Francisco Schlottmann Carlos Augusto Gomes Edgard Efrén Lozada Hernández Augusto Moncada-Ortega Antonio Ramos‐De la Medina Patricio Vanerio José Antonio Díaz Elizondo Emilio J. Morales Sarah Stringfield Cristián Gallardo Vinicius Cordeiro Fonseca María Emilia Muriel Frederico Cantarino Emilio J. Morales Alessandro Fichera Agustin E. Rodriguez Roberto Paúl Andrade Salinas Gonzalo Gabriel Crosbie Carlos Augusto Metidieri Menegozzo Nicolás Avellaneda C. Briones Cristopher Varela Warren E. Lichliter Cristopher Varela Darren Koppel Jorge Godoy-Lenz Franco Pascual

The workload of general surgeons is multifaceted, encompassing not only surgical procedures but also a myriad other responsibilities. From April to May 2023, we conducted CHERRIES-compliant internet-based survey analyzing clinical practice, academic engagement, and post-on-call rest. questionnaire featured six sections with 35 questions. Statistical analysis used Chi-square tests, ANOVA, logistic regression (SPSS

10.1007/s13304-024-01859-7 article EN cc-by Updates in Surgery 2024-04-29
Nicholas Avellaneda Mahmoud Al Masri Abylai Baimakhanov D Balasubramaniam Aneel Bhangu and 95 more Konstantinos Bouchagier Osman Bozbıyık Anu Carpelan Carina Chwat Miguel F Cunha Brett E Dawson M. Victoria Duque Mallén Mark Bremholm Ellebæk Tomás Elosua Gonzalez Mohamedraed Elshami Ildar Fakhradiyev Ömer Faruk Özkan Francesco Fleres Kaori Futaba Gaetano Gallo Dhruva Ghosh James Glasbey Ewen M. Harrison Richard Hooper Ritu Jain Sivesh K. Kamarajah Sreejith Veetil Erdinç Kamer James Keatley Charles H. Knowles Mukhtar Kulimbet Pawanindra Lal Elizabeth Li Bala Mahesh Polamreddy Ana Minaya‐Bravo Rohin Mittal Dion Morton Luís Roberto Manzione Nadal Ionut Negoi Dmitri Nepogodiev Omar Omar Francesco Pata Thomas Pinkney Mark A. Potter Matteo Rottoli Guilherme Marcondes I Smith Antonino Spinelli Mary L Venn Richard Hooper Dion Morton Edward Bywater Jonathan Evans Laura Magill S McKay Daniel Osei Bordom Joana Simões Mary L Venn Ademola Adeyeye Nicolás Avellaneda Nicolas C. Buchs Liam D. Cato David Finch İbrahim Umar Garzali Ana Minaya‐Bravo Hélio Luiz Fonseca Moreira Peter Neary Tomas Poškus April Camilla Roslani Elgun Samadov Mohammed Sbaih Mostafa Shalaby Baljit Singh Aad Sinha A. V. Vardanyan S. Chaudhry Matteo Frasson Jim Millward Luis Sánchez‐Guillén Niels‐Derrek Schmitz Jasper Stijns D. D. E. Zimmerman David Beard Marion Campbell Susan Moug Erman Aytaç Sue Blackwell Pamela Buchwald S Chowdhury Dragomir Dardanov Audrius Dulskas Muhammed Elhadi Alaa El‐Hussuna Zoe Garoufalia Muhammad Imran Aslam Michael E. Kelly Charles H. Knowles Beatriz Mendes Simon Ng Gianluca Pellino

Abstract Background Anastomotic leak affects 8 per cent of patients after right colectomy with a 10-fold increased risk postoperative death. The EAGLE study aimed to develop and test whether an international, standardized quality improvement intervention could reduce anastomotic leaks. Methods internationally intended protocol, iteratively co-developed by multistage Delphi process, comprised online educational module introducing stratification, intraoperative checklist, harmonized surgical...

10.1093/bjs/znad370 article EN cc-by-nc British journal of surgery 2023-11-29

Abstract Background Recent evidence challenges the current standard of offering surgery to patients with ileocecal Crohn’s disease only when they present complications disease. Methods A retrospective, multicenter comparative analysis was performed including operated for primary CD at 12 referral centers. Patients were divided in 2 groups, according indication inflammatory (ICD) or complicated (CCD) phenotype. Short-term results compared. on isolated ileocaecal (last 50 cm terminal ileum and...

10.1093/ecco-jcc/jjad212.0563 article EN Journal of Crohn s and Colitis 2024-01-01

Abstract Aim Recent evidence challenges the current standard of offering surgery to patients with ileocaecal Crohn's disease (CD) only when they present complications disease. The aim this study was compare short‐term results who underwent primary resection for either inflammatory (luminal disease, earlier in course) or complicated phenotypes, hypothesizing that latter would be associated worse postoperative outcomes. Method A retrospective, multicentre comparative analysis performed...

10.1111/codi.17056 article EN cc-by-nc-nd Colorectal Disease 2024-06-10

Early surgical treatment for patients with ileocecal Crohn's disease (CD) could be an alternative to biological therapy. The aim of this study is compare operative outcomes following resection luminal and complicated CD. Patients operated primary CD during 8 years in one tertiary-referral hospital were allocated into 2 groups: those early (luminal) (ECD), complications (CCD). A retrospective comparative analysis was performed. total 273 included the analysis, 85 (31%) which ECD group. No...

10.3390/jcm12072644 article EN cc-by Journal of Clinical Medicine 2023-04-01

Bowel dysfunction after colon cancer (CC) surgery is widely neglected in current follow up programmes. This study explored changes bowel function and quality of life (QoL) from three (3 m) to twelve months (12 CC patients undergoing right- or left-sided resection (RightSCR/LeftSCR) investigated differences between the two groups 12 m surgery.CC surgical 2018-2020 at five departments were included this population-based prospective cohort study. Included completed electronic surveys consisting...

10.1080/0284186x.2023.2246102 article EN Acta Oncologica 2023-08-17

Abstract The focus of the 2022 European Society Coloproctology (ESCP) annual campaign was diversity, equity, and inclusion (DEI) in surgery. ESCP “Operation Equal Access” sought to interview key-opinion leaders trainees, raise awareness on inequalities, inform community status topic, identify future areas for improvement. Social Media Working Group interviewed experts who have made significant contributions DEI colorectal surgery were acknowledged opinion field. interviews focused their...

10.1007/s13304-023-01685-3 article EN cc-by Updates in Surgery 2024-01-27

The aim of this work was to compare lymph node (LN) yield in patients operated on for right colon cancer (RCC) using a laparoscopic approach between those receiving an intracorporeal (ICA) or extracorporeal anastomosis (ECA).

10.1111/codi.16962 article EN Colorectal Disease 2024-04-08
Nicolás Avellaneda Sebastian Valdivieso Fabio Leiro Marcos González Marcelo Viola and 95 more Helio Moreira Reinaldo Isaacs Beron Eddy P. Licango-Naranjo Augusto Carrie Gianluca Pellino Antonino Spinelli Antonio Caycedo-Marulanda Mateo Santillán Delfina Berasategui C. J. Mayne M. Brun Diana Alejandra Pantoja Pachajoa Matías Parodi Rosario Martiarena Sergio Schlain Camila Bras Harriott Nicolás A. Rotholtz Maximiliano Bun Analia Potolicchio Yenny Quiroga Federico Carballo P Farina Carlos Vaccaro Marcos González Simón Sedziszow Gaston Ortigueira T. Seip Oscar D. Brosutti María Soledad Cian Fabio O. Leiro Romina Bianchi Julieta Yanet Espino Campagna Mariela Cedermas Pablo Arbios Agustín Alesandrini Juan Perriello Javier Ignacio Villaggi F Reinoso Barbero Juan Manuel Giordanino Gustavo Nari Juan Pablo Flórez Muñoz Natalia Mira Gesto Federico Medina Javier Santiago Minoldo G. Zanoni C. Lucas D.L. Nielsen Juan Manuel Sotelo Alvaro Leone Federico Posner D. Barletta Christian Méndez Rogerio Serafim Parra Fábio Lopes de Queiroz Daniel Maurício Londoño Estrada Rômulo Medeiros de Almeida João Batista de Sousa Bruno Augusto Alves Martins Marcela Maria Silvino Craveiro Rogério Saad-Hossne A. Zamorano Alejandro Escobar Carlos Yáñez Benedicto Misael Ocares Urzua Francisco Xavier Báez Rojas T. Rivas Felipe Bellolio Roth Daniel Miranda Christophe Riquoir Altamirano Andrés Iglesias Bettini Nelson Niño Puentes Mònica Morales Juan Camilo Correa Cote Gustavo A. Yepes López Daniela Sierra Castaño M Dorado A. Díaz V. Cao José Carlos Pereira Rosana María Babilonia Yepes Cristina Judith Padilla Herrera Laura Svidler López Maikel Pacheco Javier Ernesto Barreras González Jorge Gerardo Pereira Fraga Rafael Torres Peña Miguel Ángel Martínez Alfonso Renato Salvador Francisco David Rivadeneira Proaño Javier López-Gómez Almudena Layos-Romero Mario Alberto López Ramírez Pablo Zeron Pontones Ismael Brito Toledo Michel Hernández Valadez

Abstract Introduction Rectal cancer is a prevalent disease that requires multidisciplinary management. Results of treatment patients suffering from this malignancy in Latin America have been scarcely reported before. Methods A retrospective, multicenter study was conducted to report preoperative and operative characteristics intervened for rectal centers during 2015–2022, the short-term results were analyzed. The open any center receiving patients, irrespective volume. main outcome 30-day...

10.1007/s00384-024-04763-z article EN cc-by International Journal of Colorectal Disease 2024-12-23
Nynke G. Greijdanus Kiedo Wienholts Sander Ubels Kevin Talboom Gerjon Hannink and 95 more Albert Wolthuis F. Borja de Lacy Jérémie H. Lefèvre Michael J. Solomon Matteo Frasson Nicolás A. Rotholtz Quentin Denost Rodrigo Oliva Perez Tsuyoshi Konishi Yves Panís Martin Rutegård Roel Hompes Camiel Rosman Frans van Workum Pieter J. Tanis Johannes H.W. de Wilt Andreas J. A. Bremers F. Ferenschild Stefanie de Vriendt André D’Hoore Gabriele Bislenghi Jordi Farguell Antonio M. Lacy Paula González Atienza Charlotte S. van Kessel Yann Parc Thibault Voron M. Collard Jorge Sancho Muriel Hannia Cholewa Laura Mattioni Alice Frontali Sebastiaan W. Polle Fatih Polat Ndidi J. Obihara Bruna Borba Vailati Miranda Kusters Jurriaan B Tuynmann Sanne J A Hazen Alexander A.J. Grüter Takahiro Amano Hajime Fujiwara Mario Salomón Hernán Ruiz Ricardo González Diego Estefanía Nicolás Avellaneda Augusto Carrie Mateo Santillán Diana Alejandra Pantoja Pachajoa Matías Parodi Manuel Gielis Alf-Dorian Binder Thomas Gürtler Peter Riedl Sarit Badiani Christophe R. Berney Matthew Morgan Paul Hollington Nigel da Silva Gavin Nair Yiu Ming Ho Michael Lamparelli Raj Kapadia Hidde M. Kroon Nagendra N. Dudi‐Venkata Jianliang Liu Tarik Sammour Nicolas Flamey Paul Pattyn A Chaoui Louis Vansteenbrugge Nathalie E. J. van den Broek P. Vanclooster Charles de Gheldere Pieter Pletinckx Barbara Defoort Maxime Dewulf Mihail Slavchev Nikolay Belev Boyko Atanasov Panche Krastev M Sokolov Svilen Maslyankov P Gribnev Vasil Pavlov Tsvetomir Ivanov Martin Karamanliev E Filipov Pencho Tonchev Felix Aigner Martin Mitteregger Caterina Allmer Gerald Seitinger Nicola Colucci

The optimal treatment of anastomotic leak after rectal cancer resection is unclear. This worldwide cohort study aimed to provide an overview four strategies applied.Patients from 216 centres and 45 countries with between 2014 2018 were included. Treatment was categorized as salvage surgery, faecal diversion passive or active (vacuum) drainage, no primary/secondary diversion. primary outcome 1-year stoma-free survival. In addition, drainage compared using propensity score matching (2 : 1).Of...

10.1093/bjs/znad311 article EN cc-by-nc British journal of surgery 2023-10-11

Abstract Background Surgical management for patients with inflammatory ileocecal Crohn’s disease (CD) could be a reasonable alternative to second-line medical treatment. Methods A retrospective analysis of intervened primary CD uncomplicated (inflammatory) phenotype at four referral hospitals during 2012-2021 was performed. The objective assess short and long-term outcomes operated on inflammatory, CD. Patients due (last 50 cm the terminal ileum cecum), were considered eligible participate...

10.1093/ecco-jcc/jjad212.0517 article EN Journal of Crohn s and Colitis 2024-01-01

The LATAM-URG study was initiated to address a critical gap in the understanding of incidence, management, and outcomes urgent abdominal procedures Latin America. primary purpose this is gather comprehensive data that will inform clinical practice, improve patient outcomes, contribute global body knowledge on emergency surgical care. Specifically, aims quantify burden these procedures, assess variations identify factors high mortality associated with laparotomy region.

10.62463/surgery.100 article EN cc-by Deleted Journal 2024-12-01

Complications after ileocecal resection for Crohn's disease (CD) are frequent. The aim of this study was to analyze risk factors postoperative complications these procedures.We conducted a retrospective analysis patients treated surgically limited the region during an 8-year period at 10 medical centers specialized in inflammatory bowel (IBD) Latin America. Patients were allocated into 2 groups: those who presented major (Clavien-Dindo > II), "postoperative complication" (POC) group; and did...

10.1016/j.cireng.2023.05.002 article EN cc-by Cirugía Española (English Edition) 2023-05-25
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