Members of Guidelines Committee

Triantafyllos Doulias (Chair)

Triantafyllos Doulias

Current position

Consultant Colorectal Surgeon, Addenbrooke’s Hospital, Cambridge University Hospitals. Since 2017.

Medical school

University of Belgrade School of Medicine, Serbia. Graduated in 2002.

General surgical and colorectal training

• Georgios Gennimatas University Hospital, Thessaloniki, Greece
• Northern General Hospital, Sheffield, UK
• Cambridge Teaching Hospitals, Cambridge, UK
• Guy’s and St Thomas’ Hospital, London, UK

Main clinical and research interests

• Minimally invasive surgery
• Colorectal cancer
• Pelvic floor pathology / management of complex perianal fistula
• Locally advanced rectal cancer / pelvic exenteration
• Surgical innovation
• Surgical sepsis

Member of the Guidelines Committee since

2020

Additional information

Qualifications:

• Fellow of the American College of Surgeons (FACS)
• European Board of Surgical Qualification in coloproctology (EBSQ)
• Fellow of the Royal College of Surgeons of England (FRCS)
• Chief Residents Leadership and Management Programme, Judge Business School, University of Cambridge, Cambridge University Hospitals

Research:

• PhD Thesis: Low dose hydrocortisone prolongs survival and reverses endotoxin tolerance in a lethal model of escherichia coli sepsis in adrenalectomized rats Aristoteles University of Thessaloniki, Greece, October 2016
• MSc Thesis: The effect of radiofrequency ablation (RFA) of the affected part of the liver on the integrity of the intestinal mucosa barrier. Immunohistochemical expression of nuclear factor kB and oxidative stress Democritus University of Thrace, Greece June 2013

Journal reviewer:

• British Journal of Surgery (BJS)
• Colorectal Disease Journal
• Annals Journal & Bulletin Journal
• BMJ case reports
• Archives of International Surgery
• Annals of Surgery and Transplantation

Nicolas Avellaneda (Y-ESCP Rep)

Nicolas Avellaneda

Current position

Staff Surgeon: General, Colorectal Surgery and Proctology, “Centro de Educación Médica e Investigaciones Clínicas “Norberto Quirno” (CEMIC), Buenos Aires, Argentina. Since 2018.

Medical school

University of Hospital Italiano de Buenos Aires, Argentina. Graduated December 2012.

General surgical and colorectal training

• International Colorectal Fellow, Aarhus University Hospital, Aarhus, Denmark (2022-)
• Mastership in Coloproctology, University of East Anglia, United Kingdom (2020-2022)
• Doctor in Medical Sciences (PhD), “Centro de Educación Médica e Investigaciones Clínicas “Norberto Quirno” (CEMIC), Buenos Aires, Argentina (2020-2022)
• Colorectal Surgery Fellow, “Nueva Proctología,” Buenos Aires, Argentina (2018-2020)
• Chief of Residents, General Surgery Residence, General Surgery Department, CEMIC University Hospital, Buenos Aires, Argentina (2017-2018)
• General Surgery Residence, General Surgery Department, CEMIC University Hospital, Buenos Aires, Argentina (2013-2017)

Main clinical and research interests

• Inflammatory bowel disease
• Colorectal cancer
• Complex proctology
• Diverticular disease
• Collaborative studies

Member of the Guidelines Committee since

2023

José Azevedo

José Azevedo

Current position

• Consultant Colorectal Surgeon, Champalimaud Clinical Center, Champalimaud Foundation, Lisbon, Portugal, since 2021
• Visiting Assistant Professor, Faculty of Medicine, University of Lisbon, since 2021

Medical school

University of Lisbon, School of Medicine. Graduated in 2012.

General surgical and colorectal training

• Hospital da Horta EPE, Azores, Portugal
• Centro Hospitalar Vila Nova de Gaia/Espinho, Porto, Portugal
• Portuguese Oncology Institute, Porto, Portugal
• International Fellowship - Angelita and Joaquim Gama Institute, São Paulo, Brazil

Main clinical and research interests

• Colorectal cancer
• Minimally invasive surgery
• Robotic surgery
• Locally advanced rectal cancer/pelvic exenteration
• Organ preservation/watch-and-wait

Member of the Guidelines Committee since

2024

Niki Christou (Research Rep)

Niki Christou

Current position

• Professor and Consultant in Digestive surgery, Department of Digestive, General and Endocrine Surgery, Limoges University Hospital, France, since September 2022
• Researcher with habilitation/accreditation to direct research (HDR) at Laboratory INSERM U1308 – CAPTuR “Control of cell Activation in Tumor Progression and Therapeutic Resistance"

Medical school

• Medical Doctor with Digestive surgery specialisation, Limoges University, France since November 2015
• Oncological surgery specialisation, since November 2017

General surgical and colorectal training

• Digestive surgery department, Limoges University Hospital, France
• Colorectal surgery department, University Hospital Birmingham, United Kingdom

Main clinical and research interests

• Mini-invasive colorectal surgery
• Clinical and translational research for colorectal cancer
• Fundamental research in colorectal cancer initiating cells
• Surgical site infections

Member of the Guidelines Committee since

2022

Additional information

• PhD Thesis on colorectal cancer initiating cells, 2017, Limoges University
• Head of the “Chaire of Excellence of colorectal cancer research”, since 2019, Limoges University, France
• Coordinator of the membership committee of #OpenSourceResearch
• Coordinator of the French report on surgical site infections under the aegis of the “French Association of Surgery” (AFC).
• Member of the French Academy of Surgery

Audrius Dulskas

Audrius Dulskas

Current position

Surgeon, director advisor at National Cancer Institute, Vilnius, Lithuania (since 2014)

Medical school

Vilnius University, Faculty of Medicine, Vilnius, Lithuania (graduated in 2009)

General surgical and colorectal training

• Vilnius University, Faculty of Medicine, Vilnius, Lithuania (graduated in 2014)
• Yonsei University, Severance Hospital, Seoul, Republic of Korea (graduated in 2016)

Main clinical and research interests

• Early colorectal cancer treatment
• Late sequel following cancer treatment
• Cancer screening

Member of the Guidelines Committee since

2022

Additional information

• PhD thesis Changes in anorectal and urogenital function in patients undergoing radical surgery for rectal cancer
• Member of Research Group (Cohort Studies), Guidelines and Regional Event committee member
• Editorial board member: Cancer treatment and Research Communications, Frontiers in surgery, Annals of Coloproctology, Lithuanian Surgery, Translation Oncology

Fabian Grass

Fabian Grass

Current position

Associate physician and consultant, Department of Visceral Surgery, Lausanne University Hospital CHUV, Lausanne, Switzerland

Medical school

University of Lausanne (graduated in 2006), University of North Carolina (UNC), NC, USA, graduated in 2005

General surgical and colorectal training

• Lausanne University Lausanne University Hospital, Switzerland, residency (2007-2012)
• Hôpital du Valais, Sion, Switzerland, chief residency (2012-2014)
• Lausanne University Hospital, Switzerland, junior consultant, colorectal surgery (2014-2018)
• Division of Colon and Rectal Surgery, Mayo Clinic, Rochester, MN, USA (fellowship)
• Lausanne University Hospital, Switzerland, senior consultant (2020 to date)

Main clinical and research interests

• Colon cancer, rectal cancer, robotic surgery, proctology
• Research: perioperative care, clinical nutrition, enhanced recovery after surgery, colorectal cancer, short stay processes/medico-economic analyses, surgical site infection prevention

Member of the Guidelines Committee since

2022

Additional information

• MD, University of Lausanne (2006)
• Swiss General Surgery Board certification (2014)
• Thesis, University of Lausanne (2015)
• United States Medical Licensing Examination (2016)
• Privat Docent, University of Lausanne (2018)
• Swiss Visceral Surgery Board certification (2020)
• Fellow of the European Board of Colorectal Surgery - EBSQ coloproctology (2020)
• Certified Intuitive Robotic Surgeon - Da Vinci Xi® system (2020)
• Fellow of the American College of Surgeons (2022)

Selected society memberships/committees:

• Founding member of the Association for Academic Surgery (2009)
• Swiss Society for Clinical Nutrition and Metabolism, member of the board (2021)
• Swiss National Representative, European Society of Coloproctology (2022)

Editorial activities:

• World Journal of Surgery, if 3.8, Editor
• Nutrients (MDPI), if 6.8, Topic Editor

Christos Kontovounisios

Christos Kontovounisios

Current position

• Head of Surgery 2nd Surgical Department Evaggelismos Athens General Hospital, Greece
• Honorary Consultant in Colorectal Surgery, The Royal Marsden NHS Foundation Trust London
• Honorary Consultant in Colorectal Surgery, The Chelsea and Westminster NHS Foundation Trust London
• Visiting Reader, Department of Surgery and Cancer Faculty of Medicine, Imperial College London
• Visiting Professor of Surgery, School of Medicine, National and Kapodistrian University of Athens (NKUA)

Medical school

Doctor of General Medicine, University of PECS, School of Medicine, Hungary, Graduated in June 2004

General surgical and colorectal training

• Naval Hospital of Athens, Greece, Surgical Department (Dec 2005 to June 2006)
• Red Cross Hospital Athens, Greece, General Surgical Residency Programme (2007 to 2012)
• Northwick Park Hospital, London, UK, Surgical Department (July to Oct 2012)
• St.Mary’s Hospital, Imperial College Healthcare NHS Trust, London, UK, Colorectal Department (October 2012 to April 2013)
• The Royal Marsden Hospital, London, Uk, Colorectal Department (2013-2014)
• Chelsea and Westminster NHS Foundation Trust, London, UK, Colorectal Department (Oct 2014 to April 2015)
• The Royal Marsden Hospital, London, Uk, Colorectal Department (April 2015 to Feb 2016)
• Chelsea and Westminster NHS Foundation Trust, London, UK, Colorectal Department (2016 to 2018)
• Department of Surgery and Cancer Faculty of Medicine, Imperial College London, UK (2018 to 2023)
• Head of Surgery 2nd Surgical Department Evaggelismos Athens General Hospital, Greece (Feb 2024 to now)

Main clinical and research interests

Specialised in the treatment of colorectal cancer, inflammatory bowel disease and other benign and complex colorectal conditions. Committed in providing advanced, patient-centred care, using minimally invasive techniques including laparoscopic and robotic surgery, to help reduce recovery time and improve outcomes.

Fully committed in academic surgery, research, education with clinical interest in robotic colorectal and pelvic exenterative surgery for locally advanced and recurrent malignant disease.

Member of the Guidelines Committee since

2025

Additional information

• PhD: 'The role of neurotensin in acute abdomen and especially in ischemic mesentery', School of Medicine, National and Kapodistrian University of Athens (NKUA)
• Membership of professional bodies:
  • Athens Medical Association
  • Hungarian Medical Association
  • Hellenic Surgical Society
  • Medical Association of Cyprus
  • European Society of Coloproctology
  • Cypriot Surgical Association
  • European Association of Endoscopic Surgery
  • Association of Coloproctology of Great Britain and Ireland
  • Greek Society of Coloproctology
  • Fellow of the American College of Surgeons
  • Fellow of the Royal College of Surgeons
  • Board of directors at the National Public Health Organisation in Greece
  • Representative of Greece in the Εuropean Commission Initiative on Colorectal Cancer (ECICC)
  • Examiner Board Ministry of Health, Greece for appointment of consultant surgeons at the National Health System
  • Head of the scientific committee of the Greek National Bowel Screening Programme
  • Central Board of Health (KESY) for Oncology , Ministry of Health Greece
  • Treasurer, Greek Chapter, American College of Surgeons (ACS)
• Editorial Board-scientific journals
  • International Editor Surgery
  • Techniques in Coloproctology
  • Journal of Clinical Medicine
  • Frontiers in Surgery – Visceral Surgery
  • Annals of Laparoscopic and Endoscopic Surgery
  • Hellenic Journal of Surgery ( HJS )
  • Section Editor for International Journal of Colorectal Disease

Lisa Massey

Lisa Massey

Current position

Consultant Colorectal Surgeon, Nottingham University Hospitals, Nottingham, UK (since 2023)

Medical school

Imperial College, London, UK (graduated in 2008)

General surgical and colorectal training

• ALSGBI travelling fellowship, UZ Leuven and Maria Middelares, Gent, Belgium
• Post-CCT Fellowship and Locum Consultant, St Mark’s Hospital, London, UK
• Registrar training in General and Colorectal Surgery, South West Peninsula Deanery, UK
• Core surgical training, Colchester Hospital, Colchester, UK

Main clinical and research interests

• Intestinal failure
• Inflammatory bowel disease
• Abdominal wall reconstruction

Member of the Guidelines Committee since

2024

Additional information

• MD thesis: Patient and staff experience of ambulatory emergency care on the surgical assessment unit, University of Exeter, 2024
• Chair of ACPGBI guidelines committee

Adele Sayers

Adele Sayers

Current position

Consultant Colorectal Surgeon, Royal Devon University Healthcare NHS Foundation Trust, Exeter (since March 2022)

Medical school

Hull York Medical School, UK (graduated 2008)

General surgical and colorectal training

• Core and Higher Surgical Training: School of Surgery, Health Education Yorkshire and Humber, UK
• Fellowship: ACPGBI + RCS Advanced IBD Fellowship, Sheffield, UK

Main clinical and research interests

• Inflammatory Bowel Disease
• Emergency Surgery
• Complex Abdominal Wall Reconstruction

Member of the Guidelines Committee since

October 2022

Additional information

• MD (awarded March 2018): Biomechanics of the anterior abdominal wall + Evaluation of a novel surgical technique for the prevention of parastomal herniation
• INGUIDE level 1 certification (2022)
• Junior Editorial Advisory Board Member: Colorectal Diseases
• Social Media Editor: Techniques in Coloproctology
• Blogger and Engagement Marketing and Income Generation committee member: Bowel Research UK
• ACPGBI Yorkshire Trainee Representative (2019-2021)
• White Rose Surgical Collaborative Secretary (2018-2019)
• Trainee co-lead and steering group member for the national (UK) collaborative projects - National Audit of
• Small Bowel Obstruction (NASBO) and Management of Acutely Symptomatic Hernia (MASH)

Robert Siegel

Robert Siegel

Current position

• Senior Surgeon, Head of Division of Colorectal Surgery,
• Co-Chair Interdisciplinary Center for Inflammatory Bowel Disease Center, and
• Coordinator Certified Colorectal Cancer Center
• Charité, Berlin, Germany

Medical school

Witten/Herdecke University, Witten, Germany (graduated in 2001)

General surgical and colorectal training

Department of Surgery and Surgical Oncology, Charité - Universitätsmedizin Berlin, Berlin, Germany

Main clinical and research interests

• Colorectal cancer
• Anal cancer
• IBD
• Functional outcomes and PROM after colorectal surgery

Member of the Guidelines Committee since

October 2022

Yegor Tryliskyy
(Y-ESCP Rep)

Yegor Tryliskyy

Current position

Specialty Registrar (ST6) in General and Colorectal Surgery - Gloucester Royal Hospital, Severn Deanery, England (since 2023)

Medical school

Bogomolets National Medical University, Kyiv, Ukraine (graduated in 2012)

General surgical and colorectal training

• Higher Surgical Trainee - Severn Deanery (2020 to present)
• Specialty Registrar - Worthing Hospital, West Sussex, England, UK (2019-20) 
• International Fellow - Worthing Hospital, West Sussex, England, UK (2017-19) 
• Research Fellow - Shupyk National Medical Academy of Postgraduate Education, Kyiv, Ukraine (2015-17)
• Doctor-Intern- Shupyk National Medical Academy of Postgraduate Education, Kyiv, Ukraine (2012-15)

Main clinical and research interests

• Inflammatory bowel disease
• Abdominal wall
• Medical Education

Member of the Guidelines Committee since

2023

Additional information

• PGCAP in Higher Education (the University of Edinburgh), Fellow of the Higher Education Academy (2023)
• Member of the Royal College of Surgeons (2019)
• MSc in Surgical Sciences from the University of Edinburgh (2015)
• Tutor of the University of Edinburgh (since 2020)
• Faculty of the Royal College of Surgeons of England (since 2019)

Carolynne Vaizey
(ex-officio / ESCP Secretary)

Carolynne Vaizey

Current position

• Consultant Colorectal Surgeon and Co-Medical Director, St Mark’s, The National Bowel Hospital, London
• Senior Lecturer, Imperial College London

Medical school

University of Cape Town

General surgical and colorectal training

• Johannesburg General Hospital, University of the Witwatersrand, South Africa
• St Mark’s the National Bowel Hospital London
• The Middlesex and University College Hospitals, UCL, London

Main clinical and research interests

• Intestinal Failure
• Faecal incontinence
• Proctology

Member of the Guidelines Committee since

2022

Additional information

• Chair of The Pelvic Floor Society, UK
• Chair of the Intestinal Failure Subcommittee, ACPGBI