Male primary retroperitoneal mucinous cystadenoma

Primary retroperitoneal mucinous cystadenoma of borderline malignancy is a rare disease, especially in male patients. Often these tumors are not incidentally found due to abdominal symptoms. We present the radiologic abdominal computed tomography scan, surgical, and pathologic images of this unique, rare condition in a male patient. Surgical treatment is recommended to establish diagnosis and treatment.