Abstract
INTRODUCTION AND IMPORTANCE: Mucinous cystic pancreatic neoplasms (MCPNs) are cystic lesions often seen in the body and tail of the pancreas. CASE PRESENTATION: In the case reported here, we presented a 39-year-old woman with complaints of upper abdominal pain. It presents with a variety of signs and symptoms, the most common being upper abdominal pain, early satiety, and dyspnea. CLINICAL DISCUSSION: The diagnosis of MCPN was done postoperatively based on pathological and immunohistochemical studies. She underwent two operations: a midline laparotomy to remove the retroperitoneal mass, and a posterolateral thoracotomy to remove the pulmonary mass. To the best of our knowledge, this is the first reported case of mucinous cystadenocarcinoma of the pancreas in the left upper abdomen, invaded as a pulmonary mass in the right lung. CONCLUSION: MCPNs frequently appear in the pancreatic body and tail. They can also be found in the mediastinum.