Introduction: Bilateral mucinous cystadenoma of the ovary are extremely rare. These tumors are benign and might lead to abdominal distension, if no secondary symptoms occur and patient delay the consultation of physicians.
Case: A 60-year-old patient was admitted to the internal medicine department for constipation and dyspnoea. Transabdominal punctions were performed because of suspected ascites. Finally the patient was transferred to the gynecological department after forced diuresis did not reduce the suspected ascites and a CT scan showed large intraabdominal masses. Tumor excision was initiated and final histology revealed bilateral mucinous cystadenoma of the ovaries.
Discussion: Huge intraabdominal tumors that almost double a patient's body weight can hardly be malign. Total tumor excision is necessary because the heterogeneous composition requires careful examination by pathologists to rule out borderline tumors and non-invasive carcinomas. After tumor excision an abdominal wall reconstruction might be necessary because of the laxity and redundancy of the skin.