Prognostic Significance of Metastatic Lymph Node Ratio in Patients with Gastric Cancer: an Evaluation in North-East of Iran

Ali  Taghizadeh-Kermani; Seyede Zeinab  Yahouiyan; Mohsen Aliakbarian; Mehdi  Seilanian Toussi

International Journal of Cancer Management

The Official Journal of Cancer Research Center (CRC), Shahid Beheshti University of Medical Sciences

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Prognostic Significance of Metastatic Lymph Node Ratio in Patients with Gastric Cancer: an Evaluation in North-East of Iran

Author(s):

Ali Taghizadeh-Kermani¹,

Seyede Zeinab Yahouiyan²,

Mohsen Aliakbarian^3,*,

Mehdi Seilanian Toussi⁴

1Cancer Research Center, Omid Hospital, Faculty of Medicine, Mashhad University of Medical Sciences; Surgical Oncology Research Center, Imam Reza Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

2Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

3Surgical Oncology Research Center, Imam Reza Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

4Cancer Research Center, Omid Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

International Journal of Cancer Management:Vol. 7, issue 2; e80520

Published online:Jun 30, 2014

Article type:Research Article

Received:Nov 25, 2013

Accepted:Mar 05, 2014

How to Cite:Ali Taghizadeh-Kermani Seyede Zeinab YahouiyanMohsen AliakbarianMehdi Seilanian ToussiPrognostic Significance of Metastatic Lymph Node Ratio in Patients with Gastric Cancer: an Evaluation in North-East of Iran.Int J Cancer Manag.7(2):e80520.

Abstract

Background: In this study we have evaluated the prognostic impact of Metastatic Lymph node Ratio (MLR) in gastric cancer patients whose have undergone curative surgical resection.

Methods: A total of 121 patients with gastric adenocarcinoma undergoing curative surgical resection (R0) in our institutions between 2003 and 2010 have been included in this study. MLR has classified into 3 groups as follows: MLR0; 0, MLR1; >0-0.33 and MLR2; 0.34-1. We have used Kaplan-Meier method to calculate survival rates and log rank test to compare survival curves between groups. Cox proportional hazards model has utilized for multivariate analysis.

Results: The median age of patients was 65 (range; 32 to 89) with a male to female ratio of 91/30 (3.03). 88 patients have undergone total gastrectomy (72.5%) and 33 subtotal gastrectomy (27.5%). With a median total retrieved lymph node of 11 (range; 6 to 44), the MLR0 to MLR2 has calculated in 28(23.1%), 31(25.6%) and 62 (51.2%) patients respectively. MLR2 (>0.33) has significantly associated with higher Tumor stage (T1-T2: 18.7% vs. T3: 56.2%, p=0.002). With a median follow up time of 12 months (range; 2-88), the 3-year survival in patients with MLR0, MLR1 and MLR2 was 75.1%, 54.8% and 9.5% respectively (p value<0.001). Tumor location (p<0.01), tumor stage (p<0.01) and lymph node stage (p<0.001) were also significant predictor of survival. MLR has also significant correlated with survival in 91 patients with less than 15 obtained lymph nodes (p<0.001). Cox-regression multivariate analysis has shown MLR as the most important and independent predictor of survival (p<0.001).

Conclusion: MLR with cutoff point of 0.33 could be used as an independent prognostic factor in gastric cancer patients whose have undergone curative surgical resection. This factor could effectively predict survival even in cases with insufficient (<15) retrieved lymph nodes.

Keywords

Gastric cancer

Lymph node

Prognosis

Metastatic lymph node ratio

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