68Ga-C1 PET/ CT Imaging in Clear Cell Renal Cell Carcinoma

This study is testing a new imaging agent called 68Ga-C1 used in a PET/CT scan to better detect and stage clear cell renal cell carcinoma (the most common type of kidney cancer). **You may be eligible if...** - You are 18 or older - You have been diagnosed with, or are suspected of having, clear cell kidney cancer - Your expected survival is at least 6 months - You are willing to sign informed consent **You may NOT be eligible if...** - The kidney mass is known to be a spread from a different primary cancer - You have another active cancer requiring treatment - You received chemotherapy, radiation, or immunotherapy within the past 4 weeks - Your kidneys are not functioning well (low GFR) - You are pregnant, breastfeeding, or planning pregnancy within 6 months - You have an uncontrolled psychiatric disorder Talk to your doctor to see if this trial is right for you.