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Tumour Regression Grade – A Predictive Tool in Rectal Cancer: A 5-Year Experience from a Tertiary Centre in South India

Publication Type : Journal Article

Publisher : JMSCR (Journal of Medical Science And Clinical Research),

Source : JMSCR (Journal of Medical Science And Clinical Research), Volume 6, Issue 6, p.1005-1014 (2018)

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Campus : Kochi

School : School of Medicine

Department : Pathology

Abstract : Context: Multimodal therapy is the current recommended treatment of choice for rectal cancer. The downsizing effects of the neoadjuvant therapy/tumour regression can be assessed histologically in the resection specimen. Aims: To assess the prognostic significance of pathological grade of tumour regression in rectal cancer treated with long course neoadjuvant therapy. Settings and Design: This is a 5 year retrospective study conducted at a tertiary centre in South India. Methods and Material: 137 patients with rectal adenocarcarcinoma pre-treated by long course neoadjuvant chemoradiation followed by surgery were analysed and categorised based on the Tumour Regression Grade(TRG) into 2 groups- Group 1(Good response, TRG 0,1) and Group 2 (Poor response, TRG 2,3). Other clinical and pathological features like lymphovascular/ perineural invasion, discontinuous extramural tumour deposits, resection margin status and pTNM stage of tumour were also evaluated and all variables along with TRG were correlated with disease progression and 5 year survival. Statistical analysis used: IBM SPSS version 20.0 software. Categorical variables expressed using frequency and percentage and the continuous variables presented using mean and standard deviation. The chi-square test was used for finding prognostic factors. Univariate analyses of survival were carried out by Kaplan-Meier method and the evaluations of differences were performed with Log Rank test. Results: Group 1 showed reduced risk for disease progression (p 0.01) and better mean disease free period and overall survival (p 0.017 and p <0.001 respectively). Poor tumour regression was associated with lymphovascular and perineural invasion, regional lymph node metastases (p<0.001), and advanced stage of disease, and predicted an unfavourable outcome with estimated shorter mean time until disease progression. Conclusions: Assessment of primary tumour regression is an independent prognostic predictor. The addition of lymph node status is recommended in the pathological tumour regression grading system.

Cite this Research Publication : R. Rachel Paulose, Menon, P. Dileep, Renjitha Bhaskaran, and Sundaram, K. R., “Tumour Regression Grade - A Predictive Tool in Rectal Cancer: A 5-Year Experience from a Tertiary Centre in South India”, JMSCR (Journal of Medical Science And Clinical Research), vol. 6, no. 6, pp. 1005-1014, 2018.

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