Patients with pancreatic cancer may be eligible for this study. Candidates will be screened with a physical examination, chest X-ray, blood tests, electrocardiogram, and computerized tomography (CT) scan of the chest, abdomen and pelvis. They will also have a minor surgical procedure called a laparoscopy to evaluate the extent of their cancer. This procedure, done under general anesthesia, requires an overnight hospital stay. A small incision (about 1 inch) is made in the abdomen and a thin, flexible tube with a light and special fibers at the end is inserted into the opening. This device, called a laparoscope, allows the surgeon to see inside the abdominal cavity to evaluate the tumor and also to remove a small piece of tumor tissue for examination.