28-year-old male with ESRF on HD presents with bilateral flank pain and concern for obstruction. Pt states his renal failure is due to childhood 
obstruction due to posterior urethral valves. He believes that his last CT scan showed small kidneys but no evidence of obstruction. The patient appears comfortable on the cart. His vitals are stable and he is afebrile. His urinalysis reveals no evidence of hematuria or pyuria.
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