A 45-year-old woman complains of right flank pain and hematuria.

Fig. 62.1 (A–C) Delayed postcontrast CT images show a heterogeneous mass arising from the renal parenchyma and herniating into the renal pelvis. No calcification or hemorrhage is identified.

Multilocular cystic nephroma (MLCN)

• Cystic renal cell carcinoma
  
• Transitional cell carcinoma
  
• Cystic partially differentiated nephroblastoma
  
• Wilms tumor