Renal medullary fibromas which are arised from the interstitial cell of the renal medulla, show small, multiple nodules on autopsy findings over age 50, but they are 50, but they are very rare clinically, thus several cases have been reported
until
1982. When the tumors are large, their clinical presentation is characterized by loin pain, hematuria and palpable mass. The preoperative diagnosis with radiologic studies is very difficult and the confirmative diagnosis was made with pathologic
findings. Nephrectomy has been the most common useful treatment and local excision can be used. We report a case of renal medullary interstitial cell fibroma in a 17-year-old girl presented with a childhead sized palpable mass on the left upper
quadrant.
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