Case of the Month 2016-06, Page 4

CT Findings:

The right kidney is enlarged. There is severe calyceal dilatation, most severe in the upper pole. There is a large central calculus with constriction of the renal pelvis. There is infiltrative soft tissue the renal pelvis extending into the psoas muscle and partially surrounding the inferior vena cava and there are multiple enlarged adjacent lymph nodes measuring up to 18 mm in diameter. There is soft tissue infiltration of Gerota's fascia extending below the level of the kidney.

Question 4: What is the most likely diagnosis?

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