Superiority of metastatic lymph node ratio to the 7th edition UICC N staging in gastric cancer

World J Gastroenterol. 2011 Dec 14;17(46):5123-30. doi: 10.3748/wjg.v17.i46.5123.

Abstract

Aim: To compare and evaluate the appropriate prognostic indicators of lymph node basic staging in gastric cancer patients who underwent radical resection.

Methods: A total of 1042 gastric cancer patients who underwent radical resection and D2 lymphadenectomy were staged using the 6th and 7th edition International Union Against Cancer (UICC) N staging methods and the metastatic lymph node ratio (MLNR) staging. Homogeneity, discriminatory ability, and gradient monotonicity of the various staging methods were compared using linear trend χ(2), likelihood ratio χ(2) statistics, and Akaike information criterion (AIC) calculations. The area under the curve (AUC) was calculated to compare the predictive ability of the aforementioned three staging methods.

Results: Optimal cut-points of the MLNR were calculated as MLNR0 (0), MLNR1 (0.01-0.30), MLNR2 (0.31-0.50), and MLNR3 (0.51-1.00). In univariate, multivariate, and stratified analyses, MLNR staging was superior to the 6th and 7th edition UICC N staging methods. MLNR staging had a higher AUC, higher linear trend and likelihood ratio χ(2) scores and lower AIC values than the other two staging methods.

Conclusion: MLNR staging predicts survival after gastric cancer more precisely than the 6th and 7th edition UICC N classifications and should be considered as an alternative to current pathological N staging.

Keywords: Gastric cancer; Metastatic lymph node ratio; Prognosis.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Female
  • Follow-Up Studies
  • Humans
  • Lymph Node Excision
  • Lymph Nodes / pathology*
  • Lymphatic Metastasis / pathology*
  • Male
  • Middle Aged
  • Neoplasm Staging / methods*
  • Predictive Value of Tests
  • Prognosis
  • ROC Curve
  • Stomach Neoplasms / classification*
  • Stomach Neoplasms / pathology*
  • Stomach Neoplasms / surgery
  • Young Adult