The image shows the ten most studied cancer sites in the NIH global cancer research portfolio through awards.

Not Site-Specific Cancer: 29% 
Breast Cancer: 10% 
Lung Cancer: 7% 
Brain Tumor: 6%
Leukemia: 5% 
Prostate Cancer: 5%
Colon and Rectal Cancer: 5% 
Pancreatic Cancer: 4%
Melanoma: 3%
Liver Cancer: 3%