Presentation of Case A 51-year-old woman was admitted to the hospital because of right flank pain and microscopic hematuria. She was well until three years earlier, when abdominal pain developed. An intravenous urographic examination, performed elsewhere, was reported to be negative. Thirteen months before admission her physician found microscopic hematuria on a routine examination. Cystoscopic examination revealed no abnormality; a biopsy was not performed. Five months before entry right flank pain and nausea developed. She returned to her physician, who again found microscopic hematuria. Another intravenous urographic examination was reported to be negative. One month later she was again evaluated….
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