Role of thymidylate synthase (TS) polymorphisms (SNPs) as a potential prognostic factor in locally advanced rectal cancer (LARC) treated with neoadjuvant chemoradiotherapy (preCh-RT).

2011 ◽  
Vol 29 (15_suppl) ◽  
pp. e14080-e14080
Author(s):  
R. Vera ◽  
V. Arrazubi ◽  
A. Viúdez ◽  
D. Guerrero ◽  
M. L. Gomez Dorronsoro ◽  
...  
Keyword(s):  
Rectal Cancer ◽  
Prognostic Factor ◽  
Thymidylate Synthase ◽  
Locally Advanced ◽  
Neoadjuvant Chemoradiotherapy ◽  
Advanced Rectal Cancer ◽  
Locally Advanced Rectal Cancer ◽  
Potential Prognostic Factor

Polymorphisms of thymidylate synthase as prognostic factor in rectal cancer.

2011 ◽  
Vol 29 (4_suppl) ◽  
pp. 433-433
Author(s):  
V. Arrazubi ◽  
J. Suarez ◽  
D. Guerrero ◽  
K. Cambra ◽  
M. L. Gomez Dorronsoro ◽  
...  
Keyword(s):  
Rectal Cancer ◽  
Thymidylate Synthase ◽  
Locally Advanced ◽  
Neoadjuvant Chemoradiotherapy ◽  
Disease Free Survival ◽  
Advanced Rectal Cancer ◽  
Locally Advanced Rectal Cancer ◽  
Tumour Regression ◽  
The Difference

433 Background: Neoadjuvant fluoropyrimidine-based chemotherapy (ChT) plus radiotherapy (Rt) is a standard approach for locally advanced rectal cancer. Polymorphisms of thymidylate synthase (TS), the target for fluoropyrimidines, are recognized prognostic factors in colon cancer. The aim of this study was to evaluate the prognostic value of the polymorphisms of TS in rectal cancer after neoadjuvant ChT plus Rt. Methods: We studied one-hundred consecutive patients with stage II/III rectal cancer between November 2001 and March 2009. Patients underwent surgery 6-8 weeks after neoadjuvant Rt (5,040 cGy) plus fluoropyrimidine-based ChT. DNA was extracted from paraffin embedded biopsies. TS1494del6 and 5′-28bp repeat +G/C SNP polymorphisms were determined. Results: Sixty-seven percent were men and median age was 67 years. ypT stage was: T0 9%, T1 2%, T2 27%, T3 60% and T4 2%; 32% had locoregional adenopathies. The median follow-up was 45 months and relapse occurred in 20% of patients. Polimorphisms could be determined in 98% of pt: -6bp/-6bp 10%, - 6bp/+6bp 39%, +6bp/+6bp 51% and 2R/2R 72%, 2R/3R 21%, 3R/3R 6%. The grade of pathological tumour regression was not associated with polymorphisms. Relapses occurred in 40% of patients -6bp/-6bp, 22% of patients -6bp/+6bp and 21% of patients +6bp/+6bp. The difference in disease- free survival (DFS) between the first and the third groups was stadistically significative (p=0.049). No relation between 5′-28bp repeat +G/C SNP polymorphism and DFS was found. Conclusions: Our data suggest that the TS1494del6 polimorphism may be an important prognosis factor in rectal cancer receiving neoadjuvant chemoradiotherapy. No significant financial relationships to disclose.

scholarly journals Prognostic Value of the Distribution of Lymph Node Metastasis in Locally Advanced Rectal Cancer After Neoadjuvant Chemoradiotherapy

2021 ◽  
Vol 8 ◽  
Author(s):  
Bin Chen ◽  
Xing Liu ◽  
Yiyi Zhang ◽  
Jinfu Zhuang ◽  
Yong Peng ◽  
...  
Keyword(s):  
Rectal Cancer ◽  
Lymph Node ◽  
Prognostic Factor ◽  
Lymph Node Metastasis ◽  
Prognostic Value ◽  
Locally Advanced ◽  
Neoadjuvant Chemoradiotherapy ◽  
Advanced Rectal Cancer ◽  
Locally Advanced Rectal Cancer ◽  
Node Metastasis

Background: The objective of this study is to assess the prognostic value of lymph node metastasis distribution (LND) in locally advanced rectal cancer (LARC) after neoadjuvant chemoradiotherapy (nCRT).Methods: This study included 179 patients with pathological stage III LARC who underwent nCRT followed by radical surgery. LND was classified into three groups: LND1, lymph node metastasis at the mesorectum (140/179, 78.2%); LND2, lymph node metastasis along the inferior mesenteric artery trunk nodes (26/179, 14.5%); LND3, lymph node metastasis at the origin of the IMA (13/179, 7.3%). Clinicopathologic characteristics were analyzed to identify independent prognostic factors.Result: LND showed better stratification for 3-year DFS (LND1 66.8, LND2 50, and LND3 15.4%, P < 0.01) compared to the ypN (3-year DFS: N1 59.9 and N2 60.3%, P = 0.34) and ypTNM (3-year DFS: IIIA 68.6%, IIIB 57.5%, and IIIC 53.5, P = 0.19) staging systems. Similar results were found for 3-year LRFS and DMFS. According to multivariate survival analysis, LND was shown to be an independent prognostic factor for DFS, LRFS, and DMFS in patients with positive lymph nodes (P < 0.01, in all cases).Conclusion: LND is an independent prognostic factor in stage III rectal cancer after nCRT. LND can be used as a supplementary indicator for the ypTNM staging system in patients with LARC after nCRT.

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