How to participate

To assure technical and oncological quality of the TaTME technique, all participating centers will be conducted a surgical quality assessment . The end product of a Delphi methodology will comprise a technical manual and operation logbook, and a competency assessment tool, which will be used for objectively approved entry and to monitor and measure adherence to agreed standards during the trial.

The video and photographic methodology will be validated for use during the COLOR III. Specialists who have interest in the TaTME technique (and preferably already have experience with the technique), can send an email to when interested in participating in the trial.

Main Investigators

Prof. H.J. Bonjer
Prof. H.J. Bonjer
Chair Department of Surgery, VU University Medical Centre, Amsterdam, The Netherlands
Prof. G.B. Hanna
Prof. G.B. Hanna
Head of Division of Surgery, Imperial College, London, UK
Prof. A.M. Lacy
Prof. A.M. Lacy
Chief Department of Gastrointestinal Surgery, Hospital Clinic, Barcelona, Spain
Prof. W.A. Bemelman
Prof. W.A. Bemelman
Professor of Surgery, Amsterdam Medical Centre, Amsterdam, The Netherlands
C. Sietses
C. Sietses
Colorectal surgeon, Gelderse Vallei Hospital, Ede, The Netherlands
R. Hompes
R. Hompes
Colorectal surgeon, Oxford Radcliffe Hospitals, Oxford, UK
J. Knol
J. Knol
Colorectal surgeon, Jessa Hospital, Hasselt, Belgium
J.B. Tuynman
J.B. Tuynman
Colorectal surgeon, VU University Medical Centre, Amsterdam, The Netherlands
A. Tsai
A. Tsai
PhD candidate, Imperial College London, London, UK
T.W.A. Koedam
T.W.A. Koedam
PhD candidate, VU University Medical Centre, Amsterdam, The Netherlands

Participating Centers

The table below contains an overview of all the centers that
participate in the COLOR III Trial.

The Netherlands

VU University Medical Center (VUmc), Amsterdam

Spaarne Gasthuis, Hoofddorp

Academic Medical Center (AMC), Amsterdam

Gelderse Vallei Hospital, Ede

IJsselland Hospital, Capelle a/d IJssel

OLVG, Amsterdam


Imperial College, London

Churchill Hospital, Oxford

St Mark’s Hospital, Harrow/ London


University Hospital Gent, Gent

Jessa Hospital, Hasselt


Sunnybrook, Toronto

North York General, Toronto

Royal Columbian & Eagle Ridge Hospital, New Westminster


UMASS, Worchester

Florida Hospital Cancer Institute, Orlando


Slagelse Hospital, Slagelse


Caritas-KH St. Josef, Regensburg

Klinikum Leverkusen GmbH, Leverkusen

Rotkreuzklinikum, München

Charité – Universitätsmedizin, Berlin

St. Joseph Krankenhaus Berlin-Tempelhof, Berlin

Johanniter-Krankenhaus GmbH, Bonn

Asklepios Klinik, Langen

Universitätsklinikum, Leipzig



Hospital de Braga, Braga


Drammen Hospital, Drammen


Uniwersytet Jagielloński Collegium Medicum, Krakow


University of Insubria, Varese

E. Agnelli Hospital, Pinerolo

Gradenigo Hospital, Turin

Gemelli Hospital, Rome

Ospedale S. Andrea, La Spezia


Koo Foundation Sun Yat-Sen Cancer Center, Taipei


Hospital Clinico Valencia

Hospital Clínic Barcelona

Reina sofia university hospital Murcia


Krankenhaus Barmherzige Brüder, Graz