<s>[INST] My. Blood work shows a raise in my creatinrine level and my Doctor wants me to have a kidney sonogram. In the past sonogram showed a cyist on one of my kidney. I was also told that one of my kidney is smaller then the other. My RDW was 15.6 and the createnrine level was 1.6. My question is what does this mean Thank you. [/INST] HelloYour findings suggests mildly raised creatinine level. It may suggest renal disease. Patient may need clinical correlation and further investigations. Investigations include routine hologram, random blood sugar, renal function test(serum urea, creatinine clearance, GFR,serum sodium, potassium,calcium, phosphorus,bicarbonate etc.). Sonography is also important in your case. Treatment depend upon findings. Get well soon. Take Care Chat Doctor.  </s>