Abstract
A relatively rare and etiologically interesting case of retroperitoneal serous cyst is described. A 66-year-old man was admitted to the hospital because of an abdominal tumor. There were previous histories of pulmonary tuberculosis and of undergoing appendectomy. On admission the abdominal tumor measured 13×15cm. It was soft, well-defined and movable tumor with smooth surface. There was fluctuation, but no tenderness was noted. No abnormalities were found in biochemical examinatins. Abdominal ultrasonography and abdominal CT visualized a 15×7cm tumor shadow. Gastrointestinal fluoroscopy disclosed no direct relation between the tumor and intestine. Operation was performed and a 15×7×6cm retroperitoneal cyst was easily removed. The cyst contained a 650g of serum. Histopathologically, the cyst wall was made up of single layer squamous or cuboidal epithelium and no malignancy was shown. It was diagnosed as retroperitoneal serous cyst. In this case a probable origin from the genitourinary organs was suspected, but it was still unknown. Removal of the cyst is the most commonly selected treatment for retroperitoneal serous cyst and the prognosis is favorable.
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