PMC9997587_01
Computed tomography scan of the abdomen with contrast, showing multiloculated cyst in the upper pole of the left kidney (a)-Axial section, (b)-Coronal section, (c)-Sagittal section
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F1
Abdominal examination revealed left flank and left renal angle tenderness. contrast-enhanced computed tomography showed a Bosniak Type III large complex cyst measuring 6.3 cm x 6.1 cm x 6 cm arising from the upper pole pushing the hilum anteriorly, with internal septations and septal calcification, with no solid component or fat content [Figure 1].
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
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F2
These features prove the diagnosis of cystic nephroma with surrounding chronic tubulointerstitial nephritis [Figure 2].