The Whipple procedure, also known as a pancreaticoduodenectomy, is a complex surgical technique primarily used to treat pancreatic cancer. This procedure involves the removal of the head of the pancreas, part of the small intestine (duodenum), the gallbladder, and the bile duct. In some cases, a portion of the stomach may also be removed. The goal is to remove the tumor and any surrounding tissues that may contain cancer cells.