Valeria Barresi1, Luca Reggiani Bonetti2, Antonio Ieni1, Giovanni Branca1, Giovanni Tuccari1. 1. a Department of Human Pathology "G. Barresi" , Unit of Anatomic Pathology, University of Messina , Italy and. 2. b Department of Laboratory Integrated Activities , Anatomic Pathology and Legal Medicine, University of Modena and Reggio Emilia , Modena , Italy.
Abstract
OBJECTIVE: pTNM stage IIA colorectal cancer (CRC) is not currently submitted to any adjuvant treatment due to its good prognosis. Nevertheless, a percentage of cases unexpectedly recur. The aim of this study was to assess and compare the prognostic value and inter-observer agreement of a novel histological grading system based on the counting of poorly differentiated clusters (PDC) of cancer cells and that of conventional histological grade, lymphatic, venous and perineural invasion (LVI, VI, PNI), tumour budding (TB) and tumor border configuration in stage IIA CRC. MATERIALS AND METHODS: the afore mentioned histological parameters were assessed in 82 stage IIA CRCs. Inter-observer agreement and correlation with tumour relapse were analyzed by using Fleiss-Cohen's weighted K statistics, Fisher exact test and Chi-squared test. The Mantel-Cox log-rank test was applied to assess the strength of association with disease-free interval (DFI). RESULTS: inter-observer agreement was very good/good in the assessment of PDC presence and grade, while it was moderate at best in the evaluation of the other parameters. The presence of PDC, high PDC grade, LVI and TB were significantly associated with disease progression (p < 0.0001; p = 0.0012; p = 0.0308; p = 0.0002) and shorter DFI (p = 0.0001; p < 0.0001; p = 0.0129; p = 0.0008). PDC presence (p < 0.0001) and TB (p = 0.012) were independent prognostic factors in multivariate analysis. CONCLUSIONS: our findings suggest that the assessment of PDC may be useful to stratify patients with stage IIA CRC for recurrence risk, and to identify high risk patients who could benefit from adjuvant chemotherapy.
OBJECTIVE: pTNM stage IIA colorectal cancer (CRC) is not currently submitted to any adjuvant treatment due to its good prognosis. Nevertheless, a percentage of cases unexpectedly recur. The aim of this study was to assess and compare the prognostic value and inter-observer agreement of a novel histological grading system based on the counting of poorly differentiated clusters (PDC) of cancer cells and that of conventional histological grade, lymphatic, venous and perineural invasion (LVI, VI, PNI), tumour budding (TB) and tumor border configuration in stage IIA CRC. MATERIALS AND METHODS: the afore mentioned histological parameters were assessed in 82 stage IIA CRCs. Inter-observer agreement and correlation with tumour relapse were analyzed by using Fleiss-Cohen's weighted K statistics, Fisher exact test and Chi-squared test. The Mantel-Cox log-rank test was applied to assess the strength of association with disease-free interval (DFI). RESULTS: inter-observer agreement was very good/good in the assessment of PDC presence and grade, while it was moderate at best in the evaluation of the other parameters. The presence of PDC, high PDC grade, LVI and TB were significantly associated with disease progression (p < 0.0001; p = 0.0012; p = 0.0308; p = 0.0002) and shorter DFI (p = 0.0001; p < 0.0001; p = 0.0129; p = 0.0008). PDC presence (p < 0.0001) and TB (p = 0.012) were independent prognostic factors in multivariate analysis. CONCLUSIONS: our findings suggest that the assessment of PDC may be useful to stratify patients with stage IIA CRC for recurrence risk, and to identify high risk patients who could benefit from adjuvant chemotherapy.
Authors: Marloes A Smit; Gabi W van Pelt; Elisabeth Mc Dequeker; Raed Al Dieri; Rob Aem Tollenaar; J Han Jm van Krieken; Wilma E Mesker Journal: JMIR Form Res Date: 2021-03-19
Authors: Marieke A Stammes; Hendrica A J M Prevoo; Meyke C Ter Horst; Stéphanie A Groot; Cornelis J H Van de Velde; Alan B Chan; Lioe-Fee de Geus-Oei; Peter J K Kuppen; Alexander L Vahrmeijer; Elena B Pasquale; Cornelis F M Sier Journal: Int J Mol Sci Date: 2017-02-03 Impact factor: 5.923
Authors: Ann Christina Eriksen; Flemming B Sørensen; Jan Lindebjerg; Henrik Hager; René dePont Christensen; Sanne Kjær-Frifeldt; Torben F Hansen Journal: Int J Colorectal Dis Date: 2018-05-21 Impact factor: 2.571