Recommendations for reporting tumor budding in colorectal cancer based on the International Tumor Budding Consensus Conference (ITBCC) 2016.

Lugli, Alessandro; Kirsch, Richard; Ajioka, Yoichi; Bosman, Fred; Cathomas, Gieri; Dawson, Heather; El Zimaity, Hala; Fléjou, Jean-François; Hansen, Tine Plato; Hartmann, Arndt; Kakar, Sanjay; Langner, Cord; Nagtegaal, Iris; Puppa, Giacomo; Riddell, Robert; Ristimäki, Ari; Sheahan, Kieran; Smyrk, Thomas; Sugihara, Kenichi; Terris, Benoît; ... (2017). Recommendations for reporting tumor budding in colorectal cancer based on the International Tumor Budding Consensus Conference (ITBCC) 2016. Modern pathology, 30(9), pp. 1299-1311. Nature Publishing Group 10.1038/modpathol.2017.46

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Tumor budding is a well-established independent prognostic factor in colorectal cancer but a standardized method for its assessment has been lacking. The primary aim of the International Tumor Budding Consensus Conference (ITBCC) was to reach agreement on an international, evidence-based standardized scoring system for tumor budding in colorectal cancer. The ITBCC included nine sessions with presentations, a pre-meeting survey and an e-book covering the key publications on tumor budding in colorectal cancer. The 'Grading of Recommendation Assessment, Development and Evaluation' method was used to determine the strength of recommendations and quality of evidence. The following 10 statements achieved consensus: tumor budding is defined as a single tumor cell or a cell cluster consisting of four tumor cells or less (22/22, 100%). Tumor budding is an independent predictor of lymph node metastases in pT1 colorectal cancer (23/23, 100%). Tumor budding is an independent predictor of survival in stage II colorectal cancer (23/23, 100%). Tumor budding should be taken into account along with other clinicopathological features in a multidisciplinary setting (23/23, 100%). Tumor budding is counted on H&E (19/22, 86%). Intratumoral budding exists in colorectal cancer and has been shown to be related to lymph node metastasis (22/22, 100%). Tumor budding is assessed in one hotspot (in a field measuring 0.785 mm2) at the invasive front (22/22, 100%). A three-tier system should be used along with the budding count in order to facilitate risk stratification in colorectal cancer (23/23, 100%). Tumor budding and tumor grade are not the same (23/23, 100%). Tumor budding should be included in guidelines/protocols for colorectal cancer reporting (23/23, 100%). Members of the ITBCC were able to reach strong consensus on a single international, evidence-based method for tumor budding assessment and reporting. It is proposed that this method be incorporated into colorectal cancer guidelines/protocols and staging systems.

Item Type:

Journal Article (Review Article)

Division/Institute:

04 Faculty of Medicine > Service Sector > Institute of Pathology
04 Faculty of Medicine > Service Sector > Institute of Pathology > Translational Research Unit

UniBE Contributor:

Lugli, Alessandro; Dawson, Heather and Zlobec, Inti

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

0893-3952

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Inti Zlobec

Date Deposited:

31 Jan 2018 17:31

Last Modified:

01 Feb 2018 15:51

Publisher DOI:

10.1038/modpathol.2017.46

PubMed ID:

28548122

BORIS DOI:

10.7892/boris.110624

URI:

https://boris.unibe.ch/id/eprint/110624

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