The authors report the clinico-pathological features of the so-called “cystic tumors of the kidney”, discussing data of the English literature and providing grossly and histologically illustrations. The following tumor entities will be discussed in detail: “cystic multilocular renal cell carcinoma”, “cystic nephroma”, “cystic partially differentiated nephroblastoma” and mixed (benign or malignant) epithelial/stromal tumor. The awareness of these clinico-pathologic entities by Urologist is important to assure patient a correct treatment and prognostic informations.
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