PARTIAL NEPHRECTOMY IN A METACHRONOUS MULTILOCULAR CYST OF THE KIDNEY(CYSTIC NEPHROMA)

Cystic nephroma, that is multilocular cyst, is an uncommon renal neopl asm once thought to occur only unilaterally. We report a rare case of bilateral metachronous cystic nephroma in a child, which was treated b y partial nephrectomy. Because of its benign nature this lesion is bes t managed by nephron sparing surgery. Exploration of the contralateral kidney is not necessary if modern radiological techniques are used. M agnetic resonance imaging angiography is an excellent noninvasive meth od to assess renal vessels before partial nephrectomy. Periodic ultras ound or computerized tomography screening of the remaining renal unit is recommended.