55-yo, awaiting transplant, suspect renal neoplasm, next step?

MKSAP 16 question: 55-yo awaiting kidney transplant (ESRD per lupus). Kidney ultrasound reveals a complex-appearing mass suspicious for a renal neoplasm in the right kidney. Which of the following is the most appropriate imaging study to perform next? A) CT with contrast (51%) [correct answer] B) Intravenous pyelography C) MRI with gadolinium D) Positron emission tomography (30%) [wrong answer that I chose] So I understand that CT is the better radiological modality to characterize said... 55-yo, awaiting transplant, suspect renal neoplasm, next step?
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