[Ureteral obstruction caused by retroperitoneal metastasis of gastric carcinoma]

Nine patients with ureteric obstruction caused by retroperitoneal metastasis of gastric tumor have been observed in our clinic during the last five years. In all cases flank pain and the dilatation of the renal collecting system were the first signs of the disease. Despite the urological and radiological examinations in 3 cases the exact cause of the occlusion could be established only by autopsy. Most of the carcinomas showed the same histological type and were advanced tumors at the time of diagnosis. This kind of aggressive tumor carries a very poor prognosis, palliative nephrostomy has been performed.