Among the mixed epithelial–stromal tumours of the Kidney Multilocular cystic nephroma is a, rare(1%–2% of all renal tumours) ,non genetic and benign multicystic lesion.This unilateral renal musticystic lesion shows bimodal age distribution i.e.bellow 2 years old and in adults. MCN ,Cystic Partially differentiated nephroblastoma and Cystic Wilms tumors are a spectrum with benign to malignant nature respectively.