Pancreatic injury post blunt abdominal trauma is exceedingly rare. When complete major pancreatic duct (MPD) disruption occurs, a disconnection between the pancreas and the duodenum can take place, ultimately leading to fistula formation. We describe a case of MPD disruption following blunt abdominal trauma, complicated by a fistula between the pancreas and an open abdomen (pancreatico-atmospheric fistula). Although the fistula was managed using standard methods for treating pancreatic fistulas, wound care was a significant challenge in this case where the fistula exteriorized into an open abdomen.