Select where a tumor might have started from the menu on the left.
Select how far you think the tumor might have spread by selecting a number from 1 to 20 from the menu on the right. Predicted metastases are seen as changing colors of regional lymph nodes. Advance the disease and see metastases increase - more at some places than others.
These predictions are over 95% accurate and are based on over 1400 patients (Gray Klasky Byers, 1993, Visualizing complex patterns in the spread of head and neck cancers, International Journal of Supercomputer Applications 7:167-178.).