Large primary retroperitoneal mucinous cystadenoma managed laparoscopically: Case report and literature review

Background: Retroperitoneal cystic lesions (RCLs) are uncommon clinical findings that arise within the retroperitoneal compartments and account for various etiologies. They can be benign or malignant in nature and may present with different manifestations. Case report: A 55-year-old woman presented with nonspecific right sided abdominal pain. Ultrasound detected a large cyst in the right retroperitoneal region, computed tomography revealed a large well-defined cystic lesion measuring 13 X 9 X 6 cm in the right posterior peritoneum extending from the subhepatic area to the right pelvis. Laparoscopic complete resection performed with uneventful perioperative course. Histopathologic findings were suggestive of mucinous cystadenoma. Conclusion: Primary Retroperitoneal Mucinous Cystadenoma (PRMC) is an extremely rare pathology that can pose some challenge for clinicians. Awareness of this entity can help us in establishing the diagnosis and provide an optimal management. Although laparotomy is considered the standard approach of huge mucinous cystadenomas; laparoscopic surgery can be a safe and adequate therapeutic option. Keywords: retroperitoneal cystic lesions (RCL); primary retroperitoneal mucinous cystadenomas (PRMCs); cystadenoma; mucinous; laparoscopy.