Inter- rater agreement between radiologists using the novel CT- TDV (T3c+; tumour deposits; EMVI) system in patients with potentially curable right colon cancer

초록

Objectives: The novel CT- TDV scoring system, identi-fying T3c + disease; the presence/absence of tumour deposits and EMVI has been shown to be superior in predicting prognosis when compared to the CT- TNM staging system in the evaluation of colon cancer. Repro-ducibility of this scoring system between specialist GI radiologists has not been assessed previously. The aim of this study was to assess the inter- rater agreement of gastrointestinal radiologists in assessing the novel pre-operative CT- TDV scoring of patients with potentially curable right- sided colon cancer.Methods: Ninety- three right colon cancer pre-operative CT scans were graded as CT TDV "good" versus TDV "poor" by four radiologists. Inter- rater agreement was assessed using the intraclass correlation coefficient (ICC) between all four readers and individual readers against the central radiologist using Cohen's kappa statistic.Results: The ICC comparing those graded as TDV "good" versus TDV "poor" for all 93 cases was 0.61 (0.51-0.70) indicating moderate reliability. Individual kappa scores across the 93 cases were 0.76, 0.59 and 0.59 (p < 0.001) indi-cating moderate to substantial agreement. Conclusion: The CT TDV scoring system is reproduc-ible amongst trained gastrointestinal radiologists in the assessment of newly diagnosed right colon cancer.Advances in knowledge: This further validates the clin-ical utility of the CT TDV scoring system as a prognostic tool to guide the management of patients with poten-tially curable right colon cancer.

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