Validation of a central review board of staging prior to surgery for non-small-cell lung cancer--impact on prognosis: a multicenter study

Respiration. 2002;69(1):16-24. doi: 10.1159/000049365.

Abstract

Background: In non-small-cell lung cancer (NSCLC), the evaluation of anatomic tumor extension [tumor, node, metastasis (TNM) stage] is indispensable for the exchange of scientific information or determining prognosis.

Objective: To quantify changes in TNM stages (numerical migration) and survival (prognostic migration) resulting from the application of classificatory certainty criteria to patients with NSCLC who had undergone surgical treatment.

Methods: The study population included 1,844 patients registered by the Bronchogenic Carcinoma Cooperative Group of the Spanish Society of Pneumology and Thoracic Surgery (GCCB-S). For every patient, two evaluations were made of each component of the TNM classification: an initial classification, defined by a local representative, and a confirmed classification resulting from the application of stricter classificatory criteria by the GCCB-S Central Review Board.

Results: The results revealed scant numerical migration in the cT category (11.5% of the study population) and a general tendency toward a downstaging. In contrast, the initial cN1 category experienced a complete numerical migration and the initial cN2 category a very large numerical migration (from 200 to 22 cases). In the small group of patients for whom there was a classificatory change in cT (n = 212), the migration for the cT2 category was accompanied by a less favorable prognosis (p = 0.039, log-rank test). However, the migration of this small subset of patients did not affect the general prognosis of the study population for cT2. In cN2, the 3-year survival rate migrated from 0.42 to 0.29.

Conclusions: Numerical migration resulting from the application of stricter classificatory criteria was relevant, but had little, although unfavorable, global prognostic impact.

Publication types

  • Guideline
  • Multicenter Study
  • Practice Guideline
  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Biopsy, Needle
  • Carcinoma, Non-Small-Cell Lung / mortality
  • Carcinoma, Non-Small-Cell Lung / pathology*
  • Carcinoma, Non-Small-Cell Lung / surgery*
  • Female
  • Humans
  • Lung Neoplasms / mortality
  • Lung Neoplasms / pathology*
  • Lung Neoplasms / surgery*
  • Male
  • Neoplasm Staging / standards*
  • Preoperative Care
  • Prognosis
  • Registries
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Societies, Medical
  • Spain
  • Survival Analysis