The plot thickens. Our radiologist reports the following on this scan:
Large complex / multiloculated cystic left renal mass as described above. The differential diagnosis includes cystic renal cell carcinoma and multilocular
cystic nephroma. The appearance of this mass is incompatible with focal polycystic renal disease. Urologic consultation is recommended.
Based on this, urology is removing the kidney. We will see what the pathology shows...