The stadium of any cancer is important for its treatment and prognosis. There is a general conclusion that if the cancer doesn’t show up again in 5 years after removal it could be considered cured. In your case, it doesn't sound as if the cancer showed up again 13 years after its removal. The gallbladder can’t regenerate but some bigger intrahepatal gall ducts can extend themselves to compensate for the lack of the gallbladder tissue. The pain you‘ve experienced could be caused by gall-stones placed in the choledoccus. You can request an abdominal ultrasound to confirm or rule out this possibility. An ERCP is another diagnostic procedure that will help exclude stomach, hepatic, billiary or pancreatic disorders as possible causes for your discomfort.