Tumour border configuration in colorectal cancer: proposal for an alternative scoring system based on the percentage of infiltrating margin.

Karamitopoulou, Evanthia; Zlobec, Inti; Kölzer, Viktor; Langer, Rupert; Dawson, Heather; Lugli, Alessandro (2015). Tumour border configuration in colorectal cancer: proposal for an alternative scoring system based on the percentage of infiltrating margin. Histopathology, 67(4), pp. 464-473. Blackwell Scientific Publications 10.1111/his.12665

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AIMS Information on tumour border configuration (TBC) in colorectal cancer (CRC) is currently not included in most pathology reports, owing to lack of reproducibility and/or established evaluation systems. The aim of this study was to investigate whether an alternative scoring system based on the percentage of the infiltrating component may represent a reliable method for assessing TBC. METHODS AND RESULTS Two hundred and fifteen CRCs with complete clinicopathological data were evaluated by two independent observers, both 'traditionally' by assigning the tumours into pushing/infiltrating/mixed categories, and alternatively by scoring the percentage of infiltrating margin. With the pushing/infiltrating/mixed pattern method, interobserver agreement (IOA) was moderate (κ = 0.58), whereas with the percentage of infiltrating margins method, IOA was excellent (intraclass correlation coefficient of 0.86). A higher percentage of infiltrating margin correlated with adverse features such as higher grade (P = 0.0025), higher pT (P = 0.0007), pN (P = 0.0001) and pM classification (P = 0.0063), high-grade tumour budding (P < 0.0001), lymphatic invasion (P < 0.0001), vascular invasion (P = 0.0032), and shorter survival (P = 0.0008), and was significantly associated with an increased probability of lymph node metastasis (P < 0.001). CONCLUSIONS Information on TBC gives additional prognostic value to pathology reports on CRC. The novel proposed scoring system, by using the percentage of infiltrating margin, outperforms the 'traditional' way of reporting TBC. Additionally, it is reproducible and simple to apply, and can therefore be easily integrated into daily diagnostic practice.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Service Sector > Institute of Pathology > Clinical Pathology
04 Faculty of Medicine > Service Sector > Institute of Pathology

UniBE Contributor:

Karamitopoulou, Evanthia; Zlobec, Inti; Kölzer, Viktor; Langer, Rupert; Dawson, Heather and Lugli, Alessandro

Subjects:

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

ISSN:

0309-0167

Publisher:

Blackwell Scientific Publications

Language:

English

Submitter:

Doris Haefelin

Date Deposited:

13 Jul 2015 15:24

Last Modified:

26 Jun 2016 02:05

Publisher DOI:

10.1111/his.12665

PubMed ID:

25648412

Uncontrolled Keywords:

colorectal cancer; prognosis; tumour border configuration

URI:

https://boris.unibe.ch/id/eprint/70191

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