<s>[INST] I am 66 years old and have recently been told that I have a complex kidney cyst 1.1cm after undergoing an abdominal ultra sound.  That was done because I have an elevated potassium phosphates count with all other liver function test being normal.  I have been advised to have the ultra sound repeated in three months.  However I want to know if there are other test that rule out kidney disease like cancer that can be done sooner? [/INST] 1. GFR2. Blood Urea & S. Creatinine. 3. Renal Biopsy.4. check with your Laboratory regarding the same. </s>