Evaluation of lymph node ratio and morphologic patterns of nodal reactive hyperplasia in primary organ malignancy.

Background: Lymph node ratio (LNR) in cancer staging is the ratio of nodal metastases (LNM) to total nodes harvested (LNH). Reactive nodal hyperplasia can exhibit morphological patterns I to VI.

Aims: To measure LNR and evaluate it with tumor stage, tumor grade, LN reactive patterns, and LN size.