These results argue that PKM2 expression has no significant effect on tumor initiation or progression in a mouse pancreatic cancer model driven by mutant Kras and deletion of both copies of Trp53. Although PKM2 is highly expressed in both mouse and human PDAC tumors, deletion of PKM2 had no effect on tumor size or survival of PDAC tumor-bearing mice. The gene discussed is PKM; the disease is neoplasm.