Cystic nephroma: A bosniak III benign tumor in the kidney

摘要

Cystic nephroma (CN) is a rare kind of tumor in the kidney, which has benign pathological features and biological be- haviors but malignancy-like image manifestations. Pediatric CN is always associated with germline DICER1 mutation and belongs to DICER1 syndrome, while adult CN which is now considered a different entity apparently has nothing to do with DICER1 mutation [1]. The accurate preoperative diagnosis is of great importance in choosing proper treat- ment. This paper provides a case of adult CN as below.