TNM classification of malignant tumors. A comparison between the new (1987) and the old editions

A major revision of the tumor, nodes, metastasis (TNM) classification has been published. It eliminates previous differences between the International Union Against Cancer (UICC) and American Joint Committee on Cancer (AJCC) versions. It also updates existing site classifications and adds chapters on previously unclassified tumors. This article summarizes the major changes from the past to the present editions of the TNM classification.