An unusual case of multilocular cystic nephroma with prominent renal pelvis involvement.

摘要: Multilocular cystic nephroma (MCN) is a relatively rare, benign tumor of uncertain etiology. It typically arises from the renal parenchyma and often treated with nephrectomy. We report case MCN unusual prominent pelvis extension. A left nephrectomy was performed. multilocular lesion found in removed specimen, which had direct extension into pelvis. There were no signs malignancy. The has been very few reports. This growth pattern might be one characteristics this tumor.