To develop new drugs and determine what treatments are most appropriate for different tumor stages, scientists need to work out what changes occur at a molecular and genetic level as a tumor progresses. (salk.edu)
Treatment depends on tumor stage, with small tumors least likely to have spread making them the best surgical candidates. (animals.mom.me)
The traditional tumor staging system (TNM classification) provides limited prognostic information, and does not predict response to therapy. (cancerresearch.org)