Figure 2: Histological examination of partial nephrectomy specimen. (a) Noncommunicating cystic spaces filled with eosinophilic secretions separated by fibrous septa with chronic inflammatory infiltrate. (b) No blastemal cells, clear cells, or nephrogenic rests were noted in the intervening fibrous septa of the lesion. (c) Magnified view showing the dilated cystic tubules lined by cytologically bland cuboidal epithelium. (d) Residual renal tissue surrounding the lesion shows complete sclerosis of many glomeruli and features of chronic tubulointerstitial nephritis