Primary cancer affects certain organ, and then spreads to adjacent tissues in secondary or latter stages. (dog-health-handbook.com)
When primary cancer does occur it is often malignant. (lbah.com)
«Keep in mind almost no one dies of primary cancer,» says Raymond DuBois, provost of the University of Texas M. D. Anderson Cancer Center and a researcher of anti-inflammatory agents for cancer. (scientificamerican.com)