[Adult Wilms' tumor mimicking adrenal tumor: case report].

A 33-year-old woman was referred to our hospital for further examination of a right adrenal mass 4.5 cm in diameter. Hormonal findings were normal. Computed tomography, magnetic resonance image and angiograpy demonstrated non-functioning adrenal tumor. Right nephrectomy was performed, because the tumor adhered firmly to the upper pole of the right kidney. The pathological diagnosis was nephroblastoma (nephroblastic type, complex subtype). Postoperative chemotherapy was started for stage III Wilms' tumor. However, peripheral neuropathy such as numbness of the fingers developed. Therefore, chemotherapy was discontinued in the fifth week. The patient is currently alive without recurrence 17 months postoperatively. In adult patients, postoperative chemotherapy for nephroblastoma is often interrupted due to side effects. Further studies on the protocol for adults is necessary.