Physical Examination 
• Abdominal mass. 
• Neck mass due to enlarged lymph node. 
• Abdominal bruit (sound over renal artery).

Blood and Other Tests 
• Liver function tests . 
• Complete blood count. 
• Blood calcium determination. 
• Urinalysis.

Imaging 
• Intravenous pyelogram (IVP) .
• Ultrasound is the most sensitive test, being able to find masses as small as 3/4 in. (2 cm) in over 90 percent of
  cases. Sonograms can readily distinguish between the more commonly occurring benign or non-cancerous cyst
  and a solid tumor . When this test is combined with the intravenous pyelogram (IVP), the accuracy of a tumor
  diagnosis is over 90 percent. The sonogram can also be very helpful in determining whether the tumor has
  induced a clot in or invaded the renal vein or the inferior vena cava .