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[Partial nephrectomy in partially differentiated cystic nephroblastoma].

OBJECTIVE
To report on a case of cystic partially differentiated nephroblastoma in an adult female patient that was treated by partial nephrectomy.


METHODS/RESULTS
A 21-year-old female patient with multicystic lesions was submitted to partial nephrectomy involving the lower pole of the right kidney. The presence of embryonal blastema in the septae that separated the cysts was diagnostic of cystic partially differentiated nephroblastoma.


CONCLUSIONS
Cystic partially differentiated nephroblastoma can be considered to be a well differentiated variant of nephroblastoma (Wilms' tumor). Due to its benign nature, treatment is by conservative renal surgery, if technically possible.