A 43-year-old female visited our hospital because of lower urinary tract symptoms and left flank pain. She had experienced previous episodes of intermittent gross hematuria, dysuria, and urinary tenesmus. Whenever she had these symptoms, she visited a private clinic and was given oral antibiotics. Her symptoms usually improved after medication. Recently, her lower urinary tract symptoms had not improved despite treatment, and she came to our clinic for further evaluation and treatment. A detailed review of her past medical history revealed that she had received urologic surgery when she was a teenager. Her parents had passed away just after the surgery and the patient had no knowledge of what surgery was performed on her. On admission her vital signs were normal, and she did not have fever. On physical examination she showed left costovertebral angle tenderness. Her initial complete blood cell count and blood chemistry lab tests were normal. However, her urinalysis showed leukocytosis, and urine microscopy showed hematuria, pyuria, and bacteriuria. A plain kidney, ureter, and bladder X-ray and abdominopelvic computed tomography (CT) was taken for initial evaluation. On the kidney, ureter, and bladder X-ray and CT scans, a left ureteral stent with large calcifications at both the distal and proximal pigtail ends was detected. The CT scan also showed a severely dilated left kidney with parenchymal thinning, consistent with decreased renal function.