NEPHROBLASTOMA-LIKE RENAL ADENOMA - CASE- REPORT AN USUAL RENAL TUMOR

The nephroblastoma-like adenoma of the kidney is an extremely rare tum or with similarities to the nephroblastoma (Wilm's tumor) of the adult . In the literature, different terms are applied to these lesions. We present the case of a 64-year-old woman who underwent a nephrectomy fo r suspicion of renal cell carcinoma. Histologically the tumor consiste d of tubular and papillary formations of monomorphic tumor cells witho ut mitoses or cell-atypias and showed no fibrous capsule. The differen tial diagnosis to the nephroblastoma of the adult was difficult. Immun ohistochemically the tumor expressed the embryonic form of the neural cell adhesion molecule (N-CAM) interstitially and not in the epithelia l tumor cell as seen in Wilm's tumor. For the biologic tumor-definitio n it is important to collect and follow these very rare cases.