1. A 70-year-old man with a history of chronic pancreatitis undergoes a pancreatoduodenectomy for a 4 cm mass in the head of the pancreas. The tumor is poorly differentiated and infiltrates into the stroma. There are a few small glands present, but most of the tumor is composed of individual cells infiltrating the stroma in sheets and cords. What is the most likely molecular genetic finding in this tumor?