Dr. Nicolás Avellaneda is a highly skilled and accomplished medical surgeon with a focus on colorectal surgery and proctology. He has completed his education from some of the most prestigious institutions such as Aarhus University Hospital, Denmark and Hospital Italiano de Buenos Aires, Argentina. He has been working as a staff surgeon for a number of reputed institutions including CEMIC (Centro de Educación Médica e Investigaciones Clínicas), "Nueva Proctología" and Grupo Médico Oncológico de Cirugía Abdominal. Dr. Avellaneda is a member of several medical societies such as Argentine Association of Surgery, Argentine Society of Coloproctology, European Society of Coloproctology and International Fellow of American College of Surgeons. He has also been actively involved in teaching, having trained several assistants and currently holds the position of Assistant Professor in Medicine and Surgery. He is an active promoter of the development of collaborative databases of information of operated patients with the purpose of improving the condition of post-operative medical cares. Dr. Avellaneda is fluent in English, and has completed various English exams such as First Certificate Exam, Certificate in Advanced English Exam and IELTS. He is currently pursuing his Doctorate Degree in Medical Sciences from University Institute CEMIC and Mastership in Colorectal Surgery from University of East Anglia, England.
Selected publications from PubMed
ECCO Guidelines on Therapeutics in Ulcerative Colitis: Medical Treatment.
Gisbert JP, Chaparro M, Verstockt B, Kienle P, Minozzi S, Allocca M, Atreya R, Avellaneda N, Barreiro-de Acosta M, Battat R, Bettenworth D, Blumenstein I, Brown SR, Burke JP, Caprioli F, Casanova MJ, Christou N, de Buck van Overstraeten A, Doherty G, Eder P, El-Hussuna A, Ellul P, Fantini MC, Furfaro F, Greuter T, Hazel K, Holubar S, Kapizioni C, Kopylov U, Leong RW, Leventoglu S, Limdi JK, Noor NM, Papaconstantinou I, Peros G, Pouillon L, Reenaers C, Saibeni S, Schmidt C, Sousa P, Stassen LPS, Uzzan M, Vieujean S, Visser E, Myrelid P, Adamina M, Kucharzik T
J Crohns Colitis. 2026 Jul 7;20(7) pii: jjag066. doi: 10.1093/ecco-jcc/jjag066.
ECCO Guidelines on Therapeutics in Ulcerative Colitis: Surgical Treatment.
Adamina M, Kienle P, Chaparro M, Verstockt B, Minozzi S, Allocca M, Atreya R, Avellaneda N, Barreiro-De Acosta M, Battat R, Bettenworth D, Blumenstein I, Brown SR, Burke JP, Caprioli F, Casanova MJ, Christou N, De Buck Van Overstraeten A, Doherty G, Eder P, El-Hussuna A, Ellul P, Fantini MC, Furfaro F, Greuter T, Hazel K, Holubar S, Kapizioni C, Kopylov U, Leong RW, Leventoglu S, Limdi JK, Noor NM, Papaconstantinou I, Peros G, Pouillon L, Reenaers C, Saibeni S, Schmidt C, Sousa P, Stassen LPS, Uzzan M, Vieujean S, Visser E, Kucharzik T, Gisbert JP, Myrelid P
J Crohns Colitis. 2026 Jun 7;20(6) pii: jjag072. doi: 10.1093/ecco-jcc/jjag072.
Patient outcomes after surgery in 17 Latin American countries.
Avellaneda N, Caycedo Marulanda A
Lancet Glob Health. 2025 May;13(5):e793-e794 doi: 10.1016/S2214-109X(25)00123-8.
Long-Term Complications of Proctectomy for Refractory Perianal Crohn's Disease: A Narrative Review.
Alves Martins BA, Villar MT, Ferreira LVG, Ramos de Carvalho BDCR, Avellaneda N, de Sousa JB
J Clin Med. 2025 Apr 18;14(8) doi: 10.3390/jcm14082802.
Comment on "Targeted surgery combined with postoperative medical therapy for residual disease for severe and multifocal Crohn disease".
Avellaneda N
Surgery. 2024 Nov;176(5):1499 doi: 10.1016/j.surg.2024.07.023.
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