[Retroperitoneal malignant mesothelioma. A case report].

A case of primary malignant mesothelioma grew from retroperitoneal space is reported. A 39-year-old man was admitted to our hospital with the right non-functioning kidney on April, 1993. He had felt the right lumbal dull pain and scrotal pain about 6 month ago, the pain became stronger gradually. He consulted the other clinic, and there, he was pointed out of the loss of function of his right Kidney by the IVP. Examination of cystoscopy, retrograde pyelography, percutaneous antegrade pyelography, CT scan and ultrasonography suggested retroperitoneal tumor with unknown origin. His right ureter was totally obstructed by this tumor, and the right kidney had lost the function. The right nephrectomy and partial ureterectomy were done but this tumor was hard to be resected because of its sever invasion to the surrounding muscles and bones. The pathology of this tumor resulted in a Malignant Mesothelioma. After the operation several chemotherapy was done but any effectiveness was not gained. The tumor made rapid progress and he died of multiple organ failure in 8 months after the first operation. Malignant Mesothelioma generally arises from serous membrane, so almost of this tumor are found in the peritoneum and pleura. But in this case, the tumor developed in the retroperitoneum. I have given this case a great deal of consideration and due to its unusual nature I make this report.