XXXX : report of 2 cases and literature review.

@entity1 @entity8880 @entity1637 @entity5 @entity703
We report on 2 @entity1 with bilateral @entity8880 treated in the last 5 years. One @entity1 underwent bilateral partial nephrectomy for a solitary @entity5 in each kidney. Both @entity5 were confirmed to be @entity8880 by light and electron microscopic examination. After 4 years this @entity1 had no evidence of local recurrence or distal metastasis. The second @entity1 presented with bilateral multiple @entity8880 . Transabdominal bilateral renal exploration revealed 2 @entity5 in the right kidney and 3 @entity5 in the left kidney. Right radical nephrectomy and enucleation of the @entity703 were performed. Examination by light and electron microscopy confirmed that all @entity5 from both kidneys were @entity1637 . Only 8 cases of bilateral @entity8880 have been reported in the literature, including our 2 cases. In 6 of these 8 cases the @entity5 were multicentric, which may be a characteristic of bilateral @entity8880 . Recognizing the coexistence of multicentricity and bilaterality is important because more conservative treatment is required. However, a favorable prognosis may still be anticipated.
